Nio, Breaker of the Dead

Deathtouch
Terrorize 3- When a creature dies put three +1/+1 counters on this creature, then it fights target creature. If more than four creatures die by fighting this creature, this ability can't be activated until the end of turn.
Whenever a creature dies, you may exile it. If you do, put target creature card from exile into your hand. You may spend mana as though it were mana of any type to cast that creature.