({1} magic symbol) available, plus either ({B} magic symbol) , ({R} magic symbol) or ({G} magic symbol) available
Steps
Activate
Phyrexian Altar twice by sacrificing
Siege-Gang Commander and
Slimefoot and Squee, adding two mana in any combination of ({B} magic symbol) , ({R} magic symbol) or ({G} magic symbol)
Activate
Slimefoot and Squee by paying ({1} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) and sacrificing a Saproling, returning it and
Siege-Gang Commander from your graveyard to the battlefield
When
Siege-Gang Commander and
Slimefoot and Squee enter the battlefield, their abilities trigger
Resolve the
Slimefoot and Squee trigger, creating a 1/1 Saproling creature token
Resolve the
Siege-Gang Commander trigger, creating three 1/1 Goblin creature tokens
Activate
Phyrexian Altar four times by sacrificing two Goblins,