Ridgeback Alpha

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)
First Strike
Blood Moon's Mark — Whenever Ridgeback Alpha deals combat damage to a player, put a Blood Moon's Mark counter on up to one creature.

Whenever a creature with Bolood Moon's Mark counter on it dies, its controler creates a red 2/2
Wolf token.

"When the moon rises, so do his debts—and he always collects."