Monk Gyatso + Urza's Incubator + Plate Armor

Monk Gyatso

Urza's Incubator

Plate Armor

How it works

1. Activate Plate Armor's equip ability by paying 0, targeting another nontoken creature you control.
2. Monk Gyatso triggers, airbending the targeted creature.
3. The Plate Armor ability fizzles due to no longer having a legal target.
4. Cast the creature from exile by paying 0 due to Urza's Incubator.
5. Repeat.

This clever loop relies on the cost reduction of Urza's Incubator, chosen for the creature type you want to cast for free, combined with the continuous targeting restriction of Plate Armor to repeatedly trigger Monk Gyatso. By using Plate Armor's equip ability to target another creature you control for zero mana, you trigger Monk Gyatso's airbending ability, which exiles that creature and allows it to be recast for `{2}`. Because Urza's Incubator reduces that creature spell's cost by `{2}`, you can cast it right back onto the battlefield for free, netting you infinite enters-the-battlefield triggers, leaves-the-battlefield triggers, and a massive storm count.