Activate the Equipment by paying its equip cost, attaching it to Rograkh.
Activate Thermopod by sacrificing Rograkh, adding .
When Rograkh dies, Koll triggers, returning Rograkh from your graveyard to your hand.
Cast Rograkh by paying its mana cost.
Repeat.
This clever little engine leverages the zero-mana cost of Rograkh, Son of Rohgahh to create an endless loop right from the command zone. By equipping Rograkh and feeding him to Thermopod, you generate the red mana needed to immediately recast him. Meanwhile, Koll, the Forgemaster watches this cycle with a watchful eye, exploiting the creature's equipped status to bypass the graveyard entirely and bounce Rograkh right back to your hand each time he perishes.