Cartouche of Knowledge

Black creature spells you cast cost {1} less to cast. Whenever you cast a creature spell, each opponent loses 1 life and you gain 1 life.

If one or more -1/-1 counters would be put on a creature you control, that many -1/-1 counters minus one are put on it instead.

All creatures get -2/-2 until end of turn.

Menace When Plague Belcher enters the battlefield, put two -1/-1 counters on target creature you control. Whenever another Zombie you control dies,...

White creature spells you cast cost {1} less to cast. Whenever you cast a creature spell, create a 1/1 white Warrior creature token with vigilance.