Adagia, Windswept Bastion + Treachery + Golgari Rot Farm

Adagia, Windswept Bastion

Treachery

Golgari Rot Farm

How it works

1. Activate Golgari Rot Farm 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, Golgari Rot Farm and up to three other lands.
5. Repeat.

This ingenious loop uses Adagia, Windswept Bastion's high-tier station ability to continuously copy Treachery, feeding off the aura's enter-the-battlefield trigger to untap your entire mana base. Each iteration is fueled by the diverse colors of Golgari Rot Farm and your other tapped lands, pouring enough mana into Adagia, Windswept Bastion to spawn yet another copy. Because the token copy of Treachery is legendary, the legend rule immediately sends it to the graveyard, clearing the board so you can repeat the process indefinitely and generate infinite untaps and mana.