Feldon of the Third Path + Worldgorger Dragon + Mass Hysteria + Lithoform Engine

Feldon of the Third Path

Worldgorger Dragon

Mass Hysteria

Lithoform Engine

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 Lithoform Engine 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 dazzling loop relies on Feldon of the Third Path to repeatedly unearth Worldgorger Dragon from your graveyard, turning it into an artifact creature with haste thanks to Feldon's unique creation ability. Because Worldgorger Dragon enters the battlefield and immediately exiles all your other permanents—including Feldon, Lithoform Engine, and your mana sources—the subsequent departure of the dragon triggers the return of everything freshly untapped. The secret sauce is Lithoform Engine, which lets you copy Feldon's initial activation to kickstart the cascade right away, while Mass Hysteria ensures no summoning sickness gets in the way of your newly returned permanents.