Urtet, Remnant of Memnarch + Equilibrium + Urza's Incubator + Krark-Clan Ironworks

Urtet, Remnant of Memnarch

Equilibrium

Urza's Incubator

Krark-Clan Ironworks

How it works

1. Cast the Myr with mana value two or less in your hand by paying 0 due to Urza's Incubator.
2. Urtet and Equilibrium trigger.
3. Resolve the Urtet trigger, creating a 1/1 Myr artifact creature token.
4. Activate Krark-Clan Ironworks by sacrificing the Myr token, adding CC.
5. Resolve the Equilibrium trigger, causing you to pay 1 to return the Myr with mana value two or less currently on the battlefield to your hand.
6. Repeat an arbitrarily large number of times.
7. At the beginning of your combat phase, Urtet's second ability triggers, untapping all Myr you control.