Adagia, Windswept Bastion + Treachery + Boros Garrison

Adagia, Windswept Bastion

Treachery

Boros Garrison

How it works

1. Activate Boros Garrison and up to three other lands by tapping them, adding at least 4.
2. Activate Adagia by paying 3 and tapping it, creating a token copy of Treachery that is legendary attached to any creature.
3. If you control two legendary Treachery permanents, put one into your graveyard due to the legend rule.
4. The Treachery token's enter-the-battlefield ability triggers, untapping Adagia, Boros Garrison and up to three other lands.
5. Repeat.

This brilliant loop relies on the station mechanic of Adagia, Windswept Bastion—fueled by tapping lands including Boros Garrison—to amass enough mana and charge counters to activate its high-end copying ability. By paying to create a legendary token copy of Treachery, you trigger the new Aura's entry ability to untap Boros Garrison, Adagia, Windswept Bastion, and your other lands. The legend rule then forces the redundant Treachery into your graveyard as a state-based action, leaving your board clear to repeat the process infinitely.