Selvala, Heart of the Wilds + Slimefoot and Squee + The Fire Crystal + Phantom Train

Selvala, Heart of the Wilds

Slimefoot and Squee

The Fire Crystal

Phantom Train

How it works

1. Activate Selvala by paying and tapping it, adding at least 1.
2. Activate Phantom Train twice by sacrificing Selvala and Slimefoot and Squee.
3. Activate Slimefoot and Squee by paying 1 and sacrificing a Saproling, returning it and Selvala from your graveyard to the battlefield.
4. When Slimefoot and Squee enters the battlefield, it triggers, creating a 1/1 Saproling creature token.
5. Repeat.

This loop relies on the constant recycling of our graveyard to continuously fuel Selvala, Heart of the Wilds' mana-producing ability. Slimefoot and Squee acts as the engine by paying its resurrection cost to pull itself and Selvala right back out of the graveyard, taking advantage of the Saproling token created upon its entry. Meanwhile, Phantom Train stands ready to effortlessly sacrifice our key pieces into the graveyard to clear the path for the recursion, and The Fire Crystal silently provides haste so our returning creatures can tap for mana right away.