Unstoppable Slasher + The Mycosynth Gardens + Amulet of Vigor + Bloodthrone Vampire
Unstoppable Slasher
The Mycosynth Gardens
Amulet of Vigor
Bloodthrone Vampire
Infinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite death triggersInfinitely large creature until end of turn
How it works
Activate The Mycosynth Gardens' third ability by paying 1 and tapping it, causing it to become a copy of Amulet of Vigor.
Activate Bloodthrone Vampire by sacrificing Unstoppable Slasher.
When Unstoppable Slasher dies, its second ability triggers, returning it from your graveyard to the battlefield with two stun counters on it.
When Unstoppable Slasher enters, Amulet of Vigor and The Mycosynth Gardens trigger, untapping Unstoppable Slasher twice, which will instead remove both stun counters from Unstoppable Slasher.