Halvar, God of Battle // Sword of the Realms | Ancient Adamantoise | Ashnod's Altar

(and one other card)

All permanents on the battlefield (
Halvar as Sword of the Realms and attached to
Ancient Adamantoise and
Archelos untapped).

Activate
Ashnod's Altar by sacrificing
Ancient Adamantoise, adding ({C} magic symbol) ({C} magic symbol) .
When
Ancient Adamantoise dies, it and Sword of the Realms trigger.
Resolve the Sword of the Realms trigger, returning
Ancient Adamantoise from your graveyard to your hand.
Resolve the
Ancient Adamantoise trigger, creating ten Treasure tokens that are untapped due to
Archelos.
Activate eight Treasures by tapping and sacrificing them, adding ({4} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) ({W} magic symbol) .
Cast
Ancient Adamantoise by paying ({5} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) .
Activate Sword of the Realms by paying ({1} magic symbol) ({W} magic symbol) , attaching it to
Ancient Adamantoise.
Repeat.