I can always Count on your creatures

Equipped creature has ": This creature deals 1 damage to any target." Equip (: Attach to target creature you control. Equip only as a sorcery.)

Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature.

Black creatures you control have wither. (They deal damage to creatures in the form of -1/-1 counters.)

, : Double the number of each kind of counter on target permanent. ( is the untap symbol.)

Wither (This deals damage to creatures in the form of -1/-1 counters.) Whenever a creature an opponent controls with a -1/-1 counter on it dies, you may return that card to the battlefield under your control.