Cloudstone Curio + Hornet Queen + Mana Echoes + Stonework Packbeast

Cloudstone Curio

Hornet Queen

Mana Echoes

Stonework Packbeast

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 Stonework Packbeast three times by paying 6, adding .
10. Repeat.

This elegant loop turns the swarm of tokens from Hornet Queen into a self-sustaining engine of infinite mana and insect creation. Whenever the Queen and her brood enter the battlefield, Mana Echoes exploits their shared creature types to flood your pool with massive colorless energy, which Stonework Packbeast cheerfully filters into the exact colored mana you need. Meanwhile, Cloudstone Curio watches the chaos unfold and uses the incoming tokens to bounce the original Hornet Queen straight back to your hand, ready to be recast and start the cycle anew.