Malenia, Goddess of Rot

Double Strike, Vigilance
Scarlet Rot - At the beginning of each upkeep,
put a -0/-2 counter on each other creature.
Whenever Malenia deals combat damage to a creature, regenerate.
Waterfowl Dance - Before combat, if Malenia has
an equipment attached to it, flip a coin. If you
win the flip, combat damage dealt this turn by
Malenia is doubled.