Trusty Boomerang + Mana Echoes + Cyclops of Eternal Fury + Sokka and Suki

Trusty Boomerang

Mana Echoes

Cyclops of Eternal Fury

Sokka and Suki

How it works

1. Cast Trusty Boomerang by paying 1.
2. When Trusty Boomerang enters, Sokka and Suki's second ability triggers, creating a 1/1 Ally creature token.
3. When the Ally enters, Sokka's first ability and Mana Echoes trigger.
4. Resolve the Mana Echoes trigger, adding C for each Ally you control.
5. Resolve the Sokka trigger, attaching Trusty Boomerang to the Ally token.
6. Activate the Ally by paying 1 and tapping it, tapping a creature and returning Trusty Boomerang from the battlefield to your hand.
7. Repeat.

This loop hinges on a clever mechanical feedback loop between Trusty Boomerang and Sokka and Suki, where every iteration of bouncing and recasting the Equipment generates a fresh 1/1 white Ally creature token via Sokka and Suki's second ability. Because those tokens share the Ally creature type, Mana Echoes scales its colorless mana production higher with each iteration, easily paying the costs to keep the chain going. Meanwhile, Cyclops of Eternal Fury ensures your growing army of tokens can immediately utilize Trusty Boomerang's activated tap ability the moment they bounce and re-equip to the battlefield.