Bog Glider + Dryad Arbor + Retreat to Coralhelm + Mortuary + Maskwood Nexus

Bog Glider

Dryad Arbor

Retreat to Coralhelm

Mortuary

Maskwood Nexus

How it works

1. Activate Bog Glider by tapping it and sacrificing Dryad Arbor.
2. When Dryad Arbor dies, Mortuary triggers, putting Dryad Arbor on top of your library from your graveyard.
3. Resolve the Bog Glider ability from step 1, searching your library for Dryad Arbor and putting it onto the battlefield.
4. When Dryad Arbor enters the battlefield, Retreat to Coralhelm triggers, untapping Bog Glider.
5. Repeat.

This clever loop relies on Maskwood Nexus to turn everything on your board into a Mercenary, allowing Bog Glider to sacrifice and tutor up Dryad Arbor repeatedly. Whenever that land hits the graveyard, Mortuary instantly recycles it right back to the top of your library so Bog Glider's search can always find it. Meanwhile, every time Dryad Arbor re-enters the battlefield, Retreat to Coralhelm triggers to untap Bog Glider, resetting the entire engine for another iteration.