Requires

Composite Golem must be on the battlefield. Enduring Renewal must be on the battlefield. Molten Echoes must be on the battlefield. "Golem" chosen with Molten Echoes. Mana needed:

Steps

1. Activate Composite Golem by sacrificing it, adding .
2. When Composite Golem dies, Enduring Renewal triggers, returning Composite Golem to your hand from your graveyard.
3. Cast Composite Golem by paying .
4. When Composite Golem enters the battlefield, Molten Echoes triggers, creating a token copy of Composite Golem with haste.
5. Activate the Composite Golem token by sacrificing it, adding .
6. Repeat.

Results