Kaya, Agent of Ravnica

When Kaya deals combat damage to a player,
exile her with x suspend counters, where x is
her power.
Whenever a suspend counter is removed from
Kaya while in exile, each opponent loses one
life and you gain that much life.
"Heralded by the Orzhov, Protected by the
Azorious and guided by the Dimir, she wills
Ravnica to obey."