1

Apogee and Perigee (solar, lunar, or other)

Perigee is the closest point in the orbit of two celestial objects, and Apogee is the farthest point. Obviously, the orbit has to be elliptical, not circular, in order to have closer and farther points in the orbit. Keep in mind that this near-far relationship could exist between all kinds of celestial objects, not just suns and moons. Comet cycles are based on apogees and perigees, meteors move around with apogees and perigees, and even magical structures could have such a relationship to each other. Magical objects on the earth might activate only when a sun or moon is close; or perhaps the magical objects are huge metal blocks placed in the sky by some forgotten, ancient race, designed for some inscrutable purpose...

2

Calendar Cycles

Many cultures group years into a repeating cycle, treating different years much as Western culture interpreted the zodiacal segments of a single year. The Chinese Calendar, for example, follows a cycle of the Year of the Rat, Year of the Ox, Year of the Tiger, Year of the Rabbit, Year of the Dragon, Year of the Snake, Year of the Horse, Year of the Goat, Year of the Monkey, Year of the Rooster, Year of the Dog, and Year of the Boar. Certain characteristics are attributed to people born in the different years.

3

Celestial Cycles

The zodiac is a division of the sky into twelve regions, each called a “house.” The regions are: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces. Each house is associated with behaviors and with a particular metaphorical emblem. A fantasy world might have different zodiacal signs, or a different method of interpreting the movements of the stars. The zodiac is linked to the solar year, not the lunar year.

4

Comet Cycles

The appearance of certain predictable comets in the night sky is often given mystical significance. Comet- cycles can be a great adventure-generating device because of the long intervals between the comet’s appearances. Lots of unpredictable things can happen to places, societies, and collective memory while the comet is away. For example: if some form of lycanthropy is linked to the appearance of a comet rather than a full moon, the lycanthropic disease might be transmitted far and wide while dormant, then suddenly appear all over the place when the comet appears in the sky. It would become a sort of celestial retro-virus.

5

Device-Driven Cycle

A cycle might be derived from the operation of a device that divides time into a regular or irregular pattern. For instance, if the cycle is determined by the burning of candles without regard to the length of the candle, the cycle would be irregular. If the candles were scrupulously measured to be identical, the candle-driven cycle would be regular. Devices to measure out time could involve dripping water, candles, hourglasses, water wheels, gears, and many other mechanical arrangements.

6

Equinox and Solstice (solar cycle)

A solstice is one of the two times of year when the sun is farthest off the celestial equator. These occur at approximately June 22 (the summer solstice) and December 22 (the winter solstice). Summer solstice is the shortest night of the year, and winter solstice is the longest night. The equinox is when the sun crosses the equator and days and nights are of closest to equal length. The equinoxes occur at approximately March 21 (the Vernal Equinox, also the first day of Spring) and September 23 (the Autumnal Equinox). Note that Autumn and Spring are reversed for the northern and southern hemispheres of the earth.

7

Fashion Cycles

The types of clothes and the jewelry people wear comes into and out of fashion periodically, as do haircuts, luxury commodities, philosophies, and religious practices. Magical effects like planar gates could easily be influenced by fashions in behavior or religion. It might be, for example, that a planar gate opens only when a local god has a minimum number of worshippers present at a significant ritual. When it becomes more fashionable for people to worship that god, the chance of the gate opening would suddenly increase.

8

Freezing/Thawing Cycle

A particular cycle for a villain’s activities, or the opening of some sort of portal or dungeon entrance, could be linked to the seasonal freezing and thawing of a barrier that blocks the portal, or of a mechanism that controls it. The builder might have intended the cycle of freezing and thawing, or the seasons might have changed since the original construction. Freezing and thawing also affect the volume of water moving in rivers, and patterns of migration by animals. This is a time cycle that can be used to drive a wide variety of adventures and monsters.

9

Lunar Cycle

Earth’s lunar cycle from new moon to new moon is 29.5 days, and is called the Synodic Lunar Cycle. Measuring the lunar cycle based on when the moon arrives in the same place in the sky (regardless of phase) is called the Sidereal Cycle and is 27.1 days in length. For gaming purposes, the “average” lunar cycle of 28 days is probably close enough unless the adventure is deeply involved in astrology. The phases of the moon are: new moon, crescent moon, first quarter moon, waxing gibbous moon, full moon, waning gibbous moon, last quarter moon, crescent moon, and then new moon again. The cycle of lunar eclipses is also an excellent fantasy theme, although the cycle of an eclipse is much longer than the cycle of the lunar phases.

10

Morphological Life Cycle (one creature)

Some creatures have a life cycle in which their form changes radically; butterflies begin as caterpillars, frogs begin as tadpoles, many insects go through a pupae or larval stage. Although this is related to the reproductive cycle of the species, the radical morphological changes allow these creatures to have the right body-form for the right purpose at the right time. The caterpillar form, for example, is well adapted to eating huge quantities of food, whereas the mobility of the butter y stage allows for finding stronger mates more easily. Intelligent creatures with morphological cycles might open and close portals (or be able to, based on their current phase). For example, a gate might remain closed while eggs gestate in some bizarre inter-dimensional space, or be opened when the creatures are in a predatory body-form and then close again. Only the strong and well fed predators would make it back to the gate, and would then be all together within the gate for the mating cycle to begin. The possible variations on this pattern are quite numerous. If a villain is acting according to such a life cycle, it’s not necessarily because the villain is one of the morphologically shifting creatures. It might be that the villain knows how to take advantage of the changing life forms of the creatures, or that he’s allied to them but can only take advantage of the alliance when the creatures are in an intelligent form, a dangerous form, a magically powerful form, or what have you. Again, the possibilities are vast.

11

Morphological Life Cycle (series of creatures)

Just as a particular life form may go through radical morphological changes in order to link up form with function in a series of steps, it is also possible for a species to generate a sequence of life forms, only one of which is the breeder. As an example, envision a life form whose “queen” and “drone” eggs stay dormant for a long period of time, and need to be shifted from a hot incubation environment to a colder hatching environment. One “generation” of workers is a hot-weather creature that cares for the eggs during the incubation phase. As the incubation phase ends, the worker mate among themselves, producing an entirely different form – a flying form well suited for migration. The flying forms transport the eggs to a colder climate in a migration, breed again to create a cold-weather worker caste, and then die. The cold-weather caste hatches rapidly in the cold, and these workers care for the queen and drone eggs. The queens and drones y back to the hot-weather area to breed and lay eggs of three kinds: queens, drones, and more hot-weather workers. The hot-weather workers hatch quickly to care for the new queen and drone eggs, and the cycle begins again. At some point in such a cycle, it might be that the door to underground hatching chambers must be unsealed, or the migration might take place across different planes of existence, requiring the temporary opening of planar gates. A villain’s motivation in all this could be of many different kinds: he might be intercepting the migrations, stealing eggs, using the unique capabilities of one of the life forms in an alliance, etc.

12

Planetary Cycles

The proximity of particular planets to the Earth, or their location within a region of the sky (particularly a zodiacal region) can be a usable cycle for the purposes of a fantasy world, possibly having effects on magic, on different kinds of magic, villain motivations, and the opening or closing of planar gates or dungeon entrances.

13

Reproductive Cycle

The average human menstrual cycle is 28 days. If the villainess is non-human, the cycle might not be a menstrual cycle, but a cycle of being “in heat” or “in season.” This same pattern might apply to unusual monsters as well as non-human animals. Female dogs stay in heat for about 21-28 days depending on breed (as one example of a heat cycle). Note: the cycle of a male villain’s activity might be linked to someone else’s reproductive cycle. The purpose of a dungeon or planar gate that opens and seals based on the reproductive cycle of a tribe or being is fairly obvious, and could (ahem) give birth to interesting adventure scenarios.

14

Rising and Falling Magical Power

The lunar, menstrual, and solar cycles are all associated with the rise and fall of magical capabilities, but a fantasy world may have an independent cycle of rising a falling magical power, not marked by these factors. Fluctuations in magic power might be druidic (some fluctuation in the earth’s spiritual nature), might be related to arcane magic (a fluctuation in the eldritch energy that can be tapped by spells) or might be related to a fluctuation in divine power (possibly related to planar “distance, a period of dormancy, or divine battles that occupy the attention of the gods from time to time). A wizard’s personal capability might be linked to the concept of “mana,” personal reserves of magical power that might shift with the tides of time. Monsters might also feel the effects of magical change.

15

Scriptural Cycle

In Judaism, the Torah (that’s the five books of Moses, in case you’re not familiar) is divided into parshas (segments) one of which is read and studied each seven days. The parshas correspond to the Jewish lunar calendar, so that the same parsha is read at the same lunar date every year. The point of completion of the reading, when the Torah scroll is rolled back to the beginning is a major holiday, as is the middle of the Torah (the day of atonement) and the reading on the new year (which precedes the day of atonement by a week). A religious scripture in a fantasy world might also follow a cycle not related to the calendar – planar gates or subterranean chambers might be opened (or open of their own accord) in a cycle driven by the reading of scriptures instead of a calendar cycle. The reading itself might trigger these events, rather than merely corresponding to them.

16

Secondary Effect Cycle

Any of the various cycles listed in this table might be the cause of some other secondary effect that normally (but does not always) result from the primary cycle. For instance, the hatching patterns of locusts often (but does not always) cause famines. The focus of your adventure might not be the locust hatching, but the resulting famine. The periodic flooding of the Nile river was necessary to good harvests in Ancient Egypt; when that cycle failed due to low rainfall in the African interior, famines and food shortages resulted in Egypt. Adventures premised upon the secondary effects of a primary cycle might focus on the times when the expected result (the flooding of the Nile, or a locust plague) doesn’t take place. Why didn’t it? The answer might be valuable, crucial, or financially rewarding.

17

Temperature Cycles

Variations in temperature can cause all sorts of varying human behaviors, cause changes in economic factors, and can also trigger certain events in the animal and plant kingdoms. Consider such things as a locust-like insect with eggs that lie dormant until particularly hot temperatures arrive. In a completely different sort of example, consider than a villain’s opportunities for villainy might be considerably enhanced if the local community is snowbound, huddled up in cottages instead of wandering about the village with prying eyes that might see what he’s doing...

18-20

Traumatic Stress Cycle

Individuals who have suffered traumatic stress may re-live the event or its emotional impact, and this often happens on or around the anniversary of the event. The cycle could also be based on any cycle of events that either symbolize or reproduce the conditions and setting of the traumatic event. A fantasy world might have an analogue, in other words, to the way many War veterans react to the sound of helicopters and/or reworks.