Nim Deathmantle + Krark-Clan Ironworks + Magic Pot
Nim Deathmantle
Krark-Clan Ironworks
Magic Pot
Infinite creature LTBInfinite creature ETBInfinite creature sacrifice triggersInfinite death triggers
How it works
Activate Krark-Clan Ironworks by sacrificing Magic Pot, adding CC.
When Magic Pot dies, it and Nim Deathmantle trigger.
Resolve the Magic Pot trigger, creating a Treasure token.
Activate Krark-Clan Ironworks by sacrificing the Treasure, adding CC.
Resolve the Nim Deathmantle trigger, causing you to pay 4 to return the creature from your graveyard to the battlefield, and attach Nim Deathmantle to it.