Incubation Druid + Cloudstone Curio + Frog Tongue + Nature's Chosen

Incubation Druid

Cloudstone Curio

Frog Tongue

Nature's Chosen

How it works

1. Activate Incubation Druid by tapping it, adding .
2. Activate Nature's Chosen by paying 0, untapping Incubation Druid.
3. Cast Frog Tongue by paying , attaching it to Incubation Druid.
4. Frog Tongue enters the battlefield, triggering itself and Cloudstone Curio.
5. Resolve the Frog Tongue trigger, causing you to draw a card.
6. Resolve the Cloudstone Curio trigger, returning Nature's Chosen from the battlefield to your hand.
7. Cast Nature's Chosen by paying , attaching it to Incubation Druid.
8. Nature's Chosen enters the battlefield, triggering Cloudstone Curio, returning Frog Tongue from the battlefield to your hand.
9. Repeat.