Shera, Renegade Pyromancer

Magecraft — Whenever you cast or copy an
instant or sorcery spell, put a detonation counter
on target permanent an opponent control.
Whenever Shera, Renegade Pyromancer deal
combat damage to an opponent, that opponent
sacrifice each permanent they control with a
detonation counter on it. They lose one life for
each permanent sacrificed this way.
Partner