Malenia, Goddess of Rot

Lifelink, vigilance, wither
Scarlet Aeonia - While attacking, Malenia, Goddess of Rot gains flying and trample. Whenever she deals combat damage to a player, she deals that much damage to each opponent, and 1 damage to every creature on the battlefield.
When a player dealt damage by Malenia loses the game this turn, exile her, then return her to the battlefield tapped and under her owners control.