Promised Kannushi + Conspiracy + Ashnod's Altar + Urn of Godfire

Promised Kannushi

Conspiracy

Ashnod's Altar

Urn of Godfire

How it works

1. Activate Ashnod's Altar by sacrificing Promised Kannushi, adding CC.
2. When Promised Kannushi dies, its soulshift ability triggers, returning itself from your graveyard to your hand.
3. Activate Urn of Godfire's first ability by paying 2, adding .
4. Cast Promised Kannushi by paying .
5. Repeat.

By naming Spirit with Conspiracy, Promised Kannushi transforms into a valid target for its own Soulshift 7 ability, ensuring it can always loop itself right back from the graveyard to your hand whenever it hits the dirt. Ashnod's Altar provides the sacrifice outlet to fuel the engine while generating the colorless mana needed to keep casting the Kannushi, though you'll tap Urn of Godfire along the way to convert that colorless energy into the green mana required for the creature's casting cost.