Bog Glider + Dryad Arbor + Intruder Alarm + Maskwood Nexus + Mortuary

Bog Glider

Dryad Arbor

Intruder Alarm

Maskwood Nexus

Mortuary

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, searching your library for Dryad Arbor and putting it onto the battlefield.
4. When Dryad Arbor enters the battlefield, Intruder Alarm triggers, untapping all creatures.
5. Repeat.

This intricate loop transforms a humble land into a looping engine thanks to the blanket type-patching of Maskwood Nexus, which ensures that Bog Glider can fetch Dryad Arbor straight from your library whenever you need it. By sacrificing Dryad Arbor to pay for Bog Glider's ability, you trigger Mortuary to neatly recycle the land back to the top of your library right before the search resolves. Finally, every time Dryad Arbor returns to the battlefield, Intruder Alarm notices the new arrival and untaps all your creatures—including Bog Glider—allowing you to immediately repeat the entire sequence.