Feldon of the Third Path + Worldgorger Dragon + Urabrask the Hidden + Gogo, Master of Mimicry

Feldon of the Third Path

Worldgorger Dragon

Urabrask the Hidden

Gogo, Master of Mimicry

How it works

1. Activate any number of permanents by tapping them, adding at least 4.
2. Activate Feldon by paying 2 and tapping it, targeting Worldgorger Dragon.
3. Holding priority, activate Gogo by paying 2 and tapping it, copying Feldon's ability targeting Worldgorger Dragon.
4. Resolve the copy of Feldon's ability, creating a token copy of Worldgorger Dragon.
5. When the Worldgorger Dragon token enters, its first ability triggers, exiling all other permanents you control.
6. Resolve the Feldon ability from step 2, creating a token copy of Worldgorger Dragon.
7. When the Worldgorger Dragon token enters, its first ability triggers, exiling all other permanents you control.
8. When the Worldgorger Dragon token created in step 4 leaves the battlefield, its second ability triggers, returning all cards exiled with it to the battlefield.
9. Repeat.

This marvelous loop spins into motion when Feldon of the Third Path targets Worldgorger Dragon in your graveyard, while Gogo, Master of Mimicry steps in to duplicate that activation so you get back-to-back dragon copies. Each time a Worldgorger Dragon token enters the battlefield, its triggered ability exiles all your other permanents—including your lands and mana sources—which immediately forces the previous dragon token to leave the battlefield and return everything untapped. Urabrask the Hidden ensures any creatures you happen to bring along for the ride enter with haste, while the endless cycle of exiling and returning your permanents generates infinite enter-the-battlefield triggers, leaves-the-battlefield triggers, and boundless quantities of mana from your lands.