Sethron, Hurloon General + Cloudstone Curio + Universal Automaton + Mana Echoes

Sethron, Hurloon General

Cloudstone Curio

Universal Automaton

Mana Echoes

How it works

1. Cast Universal Automaton by paying 1.
2. Universal Automaton enters the battlefield, triggering Mana Echoes and Sethron.
3. Resolve the Mana Echoes trigger, adding C for each creature you control.
4. Resolve the Sethron trigger, creating a 2/2 Minotaur creature token.
5. The Minotaur enters the battlefield, triggering Cloudstone Curio and Mana Echoes.
6. Resolve the Cloudstone Curio trigger, returning Universal Automaton from the battlefield to your hand.
7. Resolve the Mana Echoes trigger, adding C for each Minotaur you control.
8. Repeat.