Ancient Adamantoise | Nim Deathmantle | Ashnod's Altar

(and one other card)

Activate
Ashnod's Altar by sacrificing
Ancient Adamantoise, adding ({C} magic symbol) ({C} magic symbol) .
When
Ancient Adamantoise dies, it and
Nim Deathmantle trigger.
Resolve the
Nim Deathmantle trigger, causing you to pay ({4} magic symbol) to return
Ancient Adamantoise from your graveyard to the battlefield and attach
Nim Deathmantle to it.
Resolve the
Ancient Adamantoise trigger, creating ten Treasure tokens that enter untapped due to
Archelos.
Resolve the
Ashnod's Altar ability.
Activate two Treasures by tapping and sacrificing them, adding ({2} magic symbol) .
Repeat.