Slimefoot and Squee + Phyrexian Altar + Pawn of Ulamog

Slimefoot and Squee

Phyrexian Altar

Pawn of Ulamog

How it works

1. Activate Phyrexian Altar twice by sacrificing another nontoken creature you control and Slimefoot and Squee, adding 1.
2. When the creatures die, Pawn of Ulamog triggers twice, creating two 0/1 Eldrazi Spawn creature tokens.
3. Activate Phyrexian Altar by sacrificing the two Eldrazi Spawns, adding .
4. Activate Slimefoot and Squee by paying 1 and sacrificing a Saproling, returning it and another creature from your graveyard to the battlefield.
5. When Slimefoot and Squee enter the battlefield, it triggers, creating a 1/1 Saproling creature token.
6. Repeat.