The Tarnished

Vigilance, Deathtouch, First Strike
When the Tarnished enters the battlefield, put a
shard counter on 5 target creatures.
When a creature with a shard counter leaves the battlefield, the Tarnished gains a shard counter.
On your end step, if the Tarnished has 5 Shard counters, he becomes the elden lord and you
win the game