Slimefoot and Squee + Phyrexian Altar + Burning-Tree Emissary

Slimefoot and Squee

Phyrexian Altar

Burning-Tree Emissary

How it works

1. Activate Phyrexian Altar twice by sacrificing Burning-Tree Emissary and Slimefoot and Squee, adding two mana in any combination of , or .
2. Activate Slimefoot and Squee by paying 1 and sacrificing a Saproling, returning it and Burning-Tree Emissary from your graveyard to the battlefield.
3. When Burning-Tree Emissary and Slimefoot and Squee enter the battlefield, their abilities trigger.
4. Resolve the Burning-Tree Emissary trigger, adding .
5. Resolve the Slimefoot and Squee trigger, creating a 1/1 Saproling creature token.
6. Repeat.