Glen Elendra Pranksters + Teferi, Mage of Zhalfir + Ornithopter + Kobolds of Kher Keep

Glen Elendra Pranksters

Teferi, Mage of Zhalfir

Ornithopter

Kobolds of Kher Keep

How it works

1. During an opponent's turn, cast the 0-cost creature in your hand by paying 0.
2. Glen Elendra Pranksters triggers, returning the other 0-cost creature from the battlefield to your hand.
3. Resolve the spell from step 1.
4. Repeat.

This loop turns zero-mana creatures into an endless dance of entering and leaving the battlefield, all at instant speed thanks to Teferi, Mage of Zhalfir granting your hand flash while locking opponents out of instant-speed interaction. By casting Ornithopter or Kobolds of Kher Keep during an opponent's turn, you trigger Glen Elendra Pranksters to bounce the other zero-mana creature back to your hand. You can then replay that bounced creature to bounce the first one, repeating the process as many times as you like. It's a wonderful little engine that runs entirely on free spells, generating an arbitrarily large storm count and endless creature triggers.