Feldon of the Third Path + Worldgorger Dragon + Dragonlord Kolaghan + Strionic Resonator

Feldon of the Third Path

Worldgorger Dragon

Dragonlord Kolaghan

Strionic Resonator

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 Strionic Resonator 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.

By using Strionic Resonator to double Feldon of the Third Path's activation, you generate overlapping Worldgorger Dragon tokens that perpetually exile and return your entire board, unlocking infinite enters-the-battlefield and leaves-the-battlefield triggers. Each reset untaps your mana sources while continually bringing back the dragon and your other permanents to fuel the loop anew. Though the combo trace focuses purely on the engine's mechanics, Dragonlord Kolaghan sits safely in your graveyard alongside the dragon, waiting to be leveraged or threatening your opponents once the dust settles.