Severed Arm of Lyst

All creatures have wither. (Creatures with wither
deal damage to creatures in the form of -1/-1 counters.)
{2}{b}, {t}: Put a -1/-1 counter on each creature.
Creatures with -1/-1 counters on them have infect until end of turn. (Creatures with infect deal damage
to creatures in the form of -1/-1 counters and to players
in the form of poison counters.)
Whether they want it or not, she offers a helping hand
to all.