Scuttling Sliver + Trazyn the Infinite + Runed Stalactite + Prismatic Geoscope

Scuttling Sliver

Trazyn the Infinite

Runed Stalactite

Prismatic Geoscope

How it works

1. Activate Trazyn using Prismatic Geoscope's ability by tapping it, adding at least three mana of any color.
2. Activate Trazyn by paying 2, untapping it.
3. Repeat.

This clever loop turns your graveyard into a mana-generating engine by using Trazyn the Infinite's Prismatic Gallery ability to copy the activated traits of other permanents. With Runed Stalactite making Trazyn every creature type, Scuttling Sliver grants him the ability to untap himself for two mana. Meanwhile, Prismatic Geoscope sits in the graveyard providing a tap ability that yields more mana than it costs to untap him, allowing you to generate infinite colored mana.