Earthcraft + Pemmin's Aura + Emmara, Soul of the Accord

Earthcraft

Pemmin's Aura

Emmara, Soul of the Accord

How it works

1. Activate a basic Island by tapping it, adding .
2. Activate Earthcraft by tapping Emmara.
3. Emmara triggers, creating a creature token.
4. Resolve the Earthcraft ability, untapping a basic Island.
5. Activate Pemmin's Aura by paying , untapping Emmara.
6. Repeat.

This engine turns a basic land into a self-sustaining mana fountain by taking advantage of Earthcraft's ability to untap lands whenever a creature is tapped. As you tap Emmara, Soul of the Accord to pay for Earthcraft, her triggered ability responds by spawning a 1/1 white Soldier creature token with lifelink, giving you an ever-growing army while your mana flows. Pemmin's Aura wraps it all together by utilizing that generated blue mana to untap Emmara with its activated ability, resetting the cycle instantly. Because the aura's untap cost is easily paid by tapping and untapping your basic lands in tandem with Earthcraft, you can loop this process indefinitely to flood the board with infinite creature tokens and infinite mana.