Cast Saw in Half by paying 2, destroying Dockside Extortionist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Dockside Extortionist tokens enter the battlefield, they trigger, creating at least ten Treasure artifact tokens.
Activate ten Treasure tokens by tapping and sacrificing them, adding 6.
Cast Timeless Witness by paying 2.
When Timeless Witness enters the battlefield, it triggers, returning Saw in Half from your graveyard to your hand.
Cast Saw in Half by paying 2, destroying Timeless Witness and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Timeless Witness tokens enter the battlefield, it triggers, returning Timeless Witness and Saw in Half from your graveyard to your hand.
Repeat.
If opponents control six or more artifacts and/or enchantments, this combo nets infinite Treasure tokens and colored mana.
This clever loop leverages the explosive mana-generation of Dockside Extortionist alongside the recursive value of Timeless Witness, all bound together by the destructive copying power of Saw in Half. By using Saw in Half to continuously slice your own creatures in half, you trigger a self-sustaining cycle: the Dockside Extortionist tokens flood your board with enough Treasure tokens to fund your spells, while the Timeless Witness tokens enter the battlefield to continuously pull Saw in Half and each other right back out of your graveyard. As long as your opponents control at least six artifacts and enchantments, the Treasures you sacrifice will more than pay for the entire process, yielding infinite mana, tokens, and recursive triggers.