Slimefoot and Squee + Phyrexian Altar + Sifter of Skulls

Slimefoot and Squee

Phyrexian Altar

Sifter of Skulls

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, Sifter of Skulls triggers twice, creating two 1/1 Eldrazi Scion creature tokens.
3. Activate Phyrexian Altar by sacrificing the two Eldrazi Scions, 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.