Selvala, Heart of the Wilds + Slimefoot and Squee + Umbral Collar Zealot + Concordant Crossroads

Selvala, Heart of the Wilds

Slimefoot and Squee

Umbral Collar Zealot

Concordant Crossroads

How it works

1. Activate Selvala by paying and tapping it, adding at least 1.
2. Activate Umbral Collar Zealot 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 transforms Selvala, Heart of the Wilds into a massive mana engine, utilizing its high power to generate more than enough green mana to fund the sequence. The key to keeping the engine running is Slimefoot and Squee, whose activation allows you to pull both it and Selvala straight out of the graveyard and back to the battlefield, immediately refreshing Selvala's tap ability thanks to Concordant Crossroads giving everything haste. Meanwhile, Umbral Collar Zealot acts as the crucial sacrifice outlet that feeds this cycle while letting you surveil through your deck, and every recursion of Slimefoot and Squee conveniently spawns the Saproling token needed to pay for the graveyard ability once again.