Cloudstone Curio + Hornet Queen + Mana Echoes + Urn of Godfire

Cloudstone Curio

Hornet Queen

Mana Echoes

Urn of Godfire

How it works

1. Cast Hornet Queen by paying 4.
2. When Hornet Queen enters the battlefield, it, Cloudstone Curio, and Mana Echoes trigger.
3. Resolve the Cloudstone Curio trigger, returning nothing to your hand from the battlefield.
4. Resolve the Hornet Queen trigger, creating four 1/1 Insect creature tokens.
5. When the Insects enter the battlefield, Mana Echoes and Cloudstone Curio each trigger four times.
6. Resolve the first Cloudstone Curio trigger, returning Hornet Queen from the battlefield to your hand.
7. Resolve all remaining Cloudstone Curio triggers, returning nothing to your hand from the battlefield.
8. Resolve all Mana Echoes triggers, adding 5 for each Insect you control.
9. Activate Urn of Godfire's first ability three times by paying 6, adding .
10. Repeat.