Triton Cavalry + Leyline Immersion + Nature's Chosen + Leyline of Singularity

Triton Cavalry

Leyline Immersion

Nature's Chosen

Leyline of Singularity

How it works

1. Activate Triton Cavalry by tapping it, adding 3 that can only be spent to cast spells.
2. Cast Nature's Chosen by paying , targeting Triton Cavalry.
3. Triton Cavalry triggers, returning Leyline Immersion to your hand from the battlefield.
4. Activate Nature's Chosen's first ability by paying 0, untapping Triton Cavalry.
5. Cast Leyline Immersion by paying 3, targeting Triton Cavalry.
6. Triton Cavalry triggers, returning Nature's Chosen to your hand from the battlefield.
7. Repeat.