Activate the Equipment by paying its equip cost, attaching it to Phyrexian Walker.
Activate Thermopod by sacrificing Phyrexian Walker, adding .
When Phyrexian Walker dies, Koll triggers, returning Phyrexian Walker from your graveyard to your hand.
Cast Phyrexian Walker by paying its mana cost.
Repeat.
This loop transforms the free sacrifice outlet Thermopod and the recursive trigger of Koll, the Forgemaster into an infinite engine for death and entry triggers. By ensuring that the zero-cost Phyrexian Walker is equipped, its death while sacrificed to Thermopod triggers Koll, bouncing the creature straight back to your hand for an immediate replay. Thermopod converts this continuous cycle into a steady supply of mana, while every iteration fuels your storm count and triggers without ever running out of resources.