Malenia, Goddess of Rot

Flying
Malenia, Goddess of Rot gains +1/+1 for each
Scarlet Rot counter on the field. At the beginning
of your end step, put a Scarlet Rot counter on
each player and each creature on the battlefield.
(A Scarlet Rot counter deals 1 damage to a player for
each one on itself or a creature under its control. A
player can pay {2} to remove one counter attached to
itself.)