Adagia, Windswept Bastion + Treachery + Dimir Aqueduct

Adagia, Windswept Bastion

Treachery

Dimir Aqueduct

How it works

1. Activate Dimir Aqueduct 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, Dimir Aqueduct and up to three other lands.
5. Repeat.

This clever loop transforms Adagia, Windswept Bastion's high-cost cloning ability into an engine by targeting Treachery itself. Once you pay to create a legendary token copy of Treachery, the legendary rule immediately sends one to the graveyard, but not before its enters-the-battlefield trigger resolves to untap your lands—including Dimir Aqueduct and Adagia, Windswept Bastion. Because Dimir Aqueduct and your other lands generate the mana needed to repeat the process, you can continuously recast the copy of Treachery to untap your entire mana base and generate infinite blue and black mana along the way.