Scuttling Sliver + Trazyn the Infinite + Unnatural Selection + Prismatic Geoscope

Scuttling Sliver

Trazyn the Infinite

Unnatural Selection

Prismatic Geoscope

How it works

1. Activate Unnatural Selection by paying 1, causing Trazyn to become a Sliver until end of turn.
2. Activate Trazyn using Prismatic Geoscope's ability by tapping it, adding at least three mana of any color.
3. Activate Trazyn by paying 2, untapping it.
4. Repeat from step 2.

Trazyn the Infinite serves as the ingenious engine of this loop by absorbing the activated abilities of every artifact in your graveyard through its Prismatic Gallery ability, including the Domain mana-production of Prismatic Geoscope. To unlock this potential, Unnatural Selection steps in to temporarily turn Trazyn into a Sliver, granting it Scuttling Sliver's untap ability. With Trazyn now able to untap itself for `{2}` and tap via Prismatic Geoscope's copied ability to generate a surplus of mana, you can repeat this cycle endlessly to yield infinite colored mana.