Activate Shuko's equip ability by paying 0, attaching it to Skirk Prospector.
Activate Skirk Prospector by sacrificing it, adding .
When Skirk Prospector dies, Koll triggers, returning Skirk Prospector from your graveyard to your hand.
Cast Skirk Prospector by paying .
Repeat.
This clever loop turns the free mana of Skirk Prospector into an endless storm of activity by relying on Koll, the Forgemaster to catch the Goblin whenever it falls. Because Shuko can be re-equipped for zero mana, Skirk Prospector is constantly kept equipped and thus qualifies for Koll's return trigger the moment it is sacrificed. This creates a perpetual cycle of casting, sacrificing, and bouncing that generates infinite mana, enters, leaves, and death triggers ready to overwhelm your opponents.