Greater Bunny (5e Creature)
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Large beast, unaligned
Pounce. The bunny lands on a creature of small size or smaller during its long or high jump, immediately grappling them (Escape DC 14). A creature grappled this way is restrained, cannot breathe, and is suffocating if they don't see it coming. The bunny may do this without realizing it.
Fear Fighter. The bunny never fights to kill, only escape. All damage it does is nonlethal unless if it thinks it can't escape (I.E., against a creature larger or faster than it, typically not the tiny humanoids of a normal party). The bunny has disadvantage on saving throws against spells and effects that cause it to become Frightened. If Frightened, its damage will become lethal until it isn't Frightened anymore.
Nibble. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 11 (1d12 + 4) piercing damage. Bunnies are not carnivores, and they won't do this unless they are attacking. A creature hit by this attack is grappled (Escape DC 14).
Batter. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 3 bludgeoning damage. The bunny punches you with its soft but massive paw. Make a Strength saving throw (DC 14). On a fail, you are pushed 15 feet and knocked prone. On a success, you are pushed 5 feet and aren't knocked prone.
Brave Bunny. As an action, the bunny can end one status effect causing it to be Frightened, Charmed, or Stunned.
It's a giant bunny, so what's not to love? Oh wait, I know, how about the fact that it's still a nonsentient creature, and therefore pretty dangerous in the right circumstances. Greater bunnies, like most creatures of The Neo Greater Material Plane are normal animals at heart, but can be dangerous for the small, lesser people that sneak onto the plane if they feel threatened because of their much larger size.
The stealth bonus is dependent on the bunny's coat of fur versus it's environment. A snow white bunny might not have this bonus while there's no snow to hide in, for example.