Leyline Immersion + Cloudstone Curio + Instill Energy

Leyline Immersion

Cloudstone Curio

Instill Energy

How it works

1. Activate the legendary creature with Leyline Immersion attached by tapping it, adding 3 that can only be spent to cast spells.
2. Cast Instill Energy by paying , attaching it to the legendary creature.
3. When Instill Energy enters the battlefield, Cloudstone Curio triggers, returning Leyline Immersion to your hand from the battlefield.
4. Activate Instill Energy by paying 0, untapping the legendary creature.
5. Cast Leyline Immersion by paying 3, attaching it to the legendary creature.
6. When Leyline Immersion enters the battlefield, Cloudstone Curio triggers, returning Instill Energy to your hand from the battlefield.
7. Repeat.