Activate any Equipment you control's equip ability by paying {0}, attaching it to Skirk Prospector.
Activate Skirk Prospector by sacrificing it, adding {R}.
When Skirk Prospector dies, Koll triggers, returning Skirk Prospector from your graveyard to your hand.
Cast Skirk Prospector by paying {R}.
Repeat.

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Infinite storm count

Koll, the Forgemaster

Skirk Prospector

Fighter Class

Activate Rograkh by sacrificing it.
Rograkh dies, triggering Koll, returning Rograkh from your graveyard to your hand.
Resolve the Rograkh ability, dealing 1 damage to any target.
Cast Rograkh by paying {0}.
Activate Mortarpod's equip ability by paying {0}, attaching it to Rograkh.
Repeat.

Infinite damage

Mortarpod

Rograkh, Son of Rohgahh

Activate Memnite by sacrificing it.
Memnite dies, triggering Koll, returning Memnite from your graveyard to your hand.
Resolve the Memnite ability, dealing 1 damage to any target.
Cast Memnite by paying {0}.
Activate Mortarpod's equip ability by paying {0}, attaching it to Memnite.
Repeat.

Memnite

Activate Rograkh by sacrificing it.
Rograkh dies, triggering Koll, returning Rograkh from your graveyard to your hand.
Resolve the Rograkh ability, dealing 1 damage to any target.
Cast Rograkh by paying {0}.
Activate Mask of Immolation's equip ability by paying {0}, attaching it to Rograkh.
Repeat.

Mask of Immolation

Activate Memnite by sacrificing it.
Memnite dies, triggering Koll, returning Memnite from your graveyard to your hand.
Resolve the Memnite ability, dealing 1 damage to any target.
Cast Memnite by paying {0}.
Activate Mask of Immolation's equip ability by paying {0}, attaching it to Memnite.
Repeat.

Activate any Equipment you control's equip ability by paying {0}, attaching it to Reckless Barbarian.
Activate Reckless Barbarian by sacrificing it, adding {R}{R}.
When Reckless Barbarian dies, Koll triggers, returning Reckless Barbarian from your graveyard to your hand.
Cast Reckless Barbarian by paying {1}{R}.
Repeat.

Reckless Barbarian

Activate Ornithopter by sacrificing it.
Ornithopter dies, triggering Koll, returning Ornithopter from your graveyard to your hand.
Resolve the Ornithopter ability, dealing 1 damage to any target.
Cast Ornithopter by paying {0}.
Activate Mortarpod's equip ability by paying {0}, attaching it to Ornithopter.
Repeat.

Ornithopter

Activate Ornithopter by sacrificing it.
Ornithopter dies, triggering Koll, returning Ornithopter from your graveyard to your hand.
Resolve the Ornithopter ability, dealing 1 damage to any target.
Cast Ornithopter by paying {0}.
Activate Mask of Immolation's equip ability by paying {0}, attaching it to Ornithopter.
Repeat.

Activate any Equipment you control's equip ability by paying {0}, attaching it to Blood Pet.
Activate Blood Pet by sacrificing it, adding {B}.
When Blood Pet dies, Koll triggers, returning Blood Pet from your graveyard to your hand.
Cast Blood Pet by paying {B}.
Repeat.

Combos with "Fighter Class"