Requires

Sigil of the New Dawn must be on the battlefield. Mana Echoes must be on the battlefield. Siege-Gang Commander must be in hand. Prismite must be on the battlefield. Mana needed:

Steps

1. Cast Siege-Gang Commander by paying .
2. When Siege-Gang Commander enters the battlefield, it and Mana Echoes trigger.
3. Resolve the Siege-Gang Commander trigger, creating three 1/1 Goblin creature tokens.
4. When the Goblin tokens enter the battlefield, Mana Echoes triggers three times.
5. Resolve all four Mana Echoes triggers, adding at least .
6. Activate Prismite four times by paying , adding .
7. Activate Siege-Gang Commander by paying and sacrificing itself.
8. Sigil of the New Dawn triggers, causing you to pay to return Siege-Gang Commander from your graveyard to your hand.
9. Resolve the Siege-Gang Commander activated ability, dealing 2 damage to any target.
10. Repeat.

Results