Sion, the Undead Juggernaut

Morbid - At the beginning of each end step,
if a creature died this turn put two +1/+1 counters on Sion, the Undead Juggernaut.
Whenever Sion, the Undead Juggernaut
deals combat damage to a player or dies, you gain X life, where X is the number of +1/+1 counters on Sion, the Undead Juggernaut.