This clever loop uses Phyrexian Altar as a mana and sacrifice engine to continually recycle Squee, the Immortal, who can be cast straight from the graveyard thanks to Squee's own inherent recursion and the cost reduction and mayhem granted by the transformed Green Goblin side of Norman Osborn // Green Goblin. Every time Squee goes to the graveyard, Field of Souls triggers to generate a 1/1 Spirit token that can be immediately sacrificed to the Altar for another mana, fueling the loop's continuous casting cost. By looping Squee and the token this way, you generate an infinite chain of creature sacrifices, enters-the-battlefield triggers, and storm count to overwhelm your opponents.