'Innistrad' cards

All creatures have vigilance. Whenever chaos ensues, creatures you control gain indestructible until end of turn.

Prevent all combat damage that would be dealt by non-Werewolf creatures. Whenever chaos ensues, each creature you control gets +2/+2, gains trample, and becomes a Werewolf in addition to its other types until end of turn.

At the beginning of your end step, mill seven cards. Then return a card at random from your graveyard to your hand. Whenever chaos ensues, return target card from your graveyard to your hand.

When you planeswalk here and at the beginning your upkeep, put a spooky counter on target creature you control. Spooky creatures you control have +1/+1 and menace. (A creature is spooky if it has a spooky counter or it could be a horror movie monster.) A Murder at Markov Manor - Whenever chaos ensues, target spooky creature you control bites target opponent or creature an opponent controls. (The creature deals damage equal to its power to the creature your opponent controls. You gain that much life.)