When Squee dies, Totentanz triggers, creating a creature token.
Activate Thermopod by sacrificing the creature token, adding .
Cast Squee from your graveyard by paying due to Green Goblin.
Repeat.
This loop turns Squee, the Immortal into an endlessly renewable source of red mana by leaning on Thermopod's sacrifice outlet. Because Squee can be cast directly from the graveyard, and Norman Osborn // Green Goblin's back face reduces graveyard spell costs while granting mayhem to discarded cards, you have all the cost-reduction and recursion engine you need to replay him repeatedly. Meanwhile, Totentanz, Swarm Piper watches this sacrificial cycle and pumps out a steady stream of Rat tokens to fuel further activations of Thermopod when needed.