1

Roll on "Avian"

Peak: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) piercing damage.

Small

Fly speed: +30 ft.

2

Roll on "Canine"

Bite: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) piercing damage.

Medium

3

Roll on "Equine"

Hooves: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) bludgeoning damage.

Large

(chart here)

4

Roll on "Behemoth"

Gore: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) piercing damage.

Huge

Trampling Charge: If the chimera moves at least 20 feet straight toward a creature and then hits it with a gore attack on the same turn, that target must succeed on a DC 15 Strength saving throw or be knocked Prone. If the target is Prone, the mammoth can make one stomp attack against it as a bonus action.

5

Roll on "Spider"

Bite: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) piercing damage.

Small

Climb speed: +10 ft. Spider Climb: The spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. Web Walker: The spider ignores movement restrictions caused by webbing.

Darkvision: 30 ft. Web Sense: While in contact with a web, the spider knows the exact location of any other creature in contact with the same web.

6

Boar

Gore: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) slashing damage.

Medium

Charge: If the chimera moves at least 20 feet straight toward a target and then hits it with a tusk attack on the same turn, the target takes an extra 7 (2d6) slashing damage. If the target is a creature, it must succeed on a DC 15 Strength saving throw or be knocked Prone.

Relentless (Recharges after a Short or Long Rest): If the boar takes 15 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead.

7

Deer

Horns: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) piercing damage.

Large

Land Speed +10 ft.

8

Goat

Horns: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) bludgeoning damage.

Medium

Charge: If the goat moves at least 20 feet straight toward a target and then hits it with a horns attack on the same turn, the target takes an extra 7 (2d6) bludgeoning damage. If the target is a creature, it must succeed on a DC 15 Strength saving throw or be knocked Prone.

Sure-Footed: The chimera has advantage on Strength and Dexterity saving throws made against effects that would knock it Prone.