Nim Deathmantle + Ashnod's Altar + Prosperous Innkeeper + Anointed Procession

Nim Deathmantle

Ashnod's Altar

Prosperous Innkeeper

Anointed Procession

How it works

1. Activate Ashnod's Altar by sacrificing Prosperous Innkeeper, adding CC.
2. When Prosperous Innkeeper dies, Nim Deathmantle triggers, causing you to pay 4 to return Prosperous Innkeeper from your graveyard to the battlefield, and attach Nim Deathmantle to it.
3. When Prosperous Innkeeper enters the battlefield, it triggers, creating two Treasure artifact tokens.
4. Activate the Treasures by tapping and sacrificing them, adding 2.
5. Repeat.

This clever loop relies on Ashnod's Altar as the sacrifice engine to fuel Nim Deathmantle's resurrection cost while simultaneously generating the mana needed to sustain it. As Prosperous Innkeeper repeatedly enters and leaves the battlefield, Anointed Procession steps in to double the Treasure tokens produced, turning the Innkeeper's entry into a net-positive mana source instead of a deficit. Meanwhile, the Innkeeper's passive life-gain ability triggers on every single iteration, effortlessly translating your infinite loop into an infinite life total.