Scuttling Sliver + Trazyn the Infinite + Hivestone + Prismatic Geoscope

Scuttling Sliver

Trazyn the Infinite

Hivestone

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 comes together by turning Trazyn the Infinite into a one-man powerhouse through the magic of type-granting and graveyard mechanics. Hivestone ensures that Trazyn is a Sliver, which instantly unlocks the "{2}: Untap this creature" ability granted to all Slivers by Scuttling Sliver. Meanwhile, Prismatic Gallery lets Trazyn inherit the activated abilities of every artifact in your graveyard—including Prismatic Geoscope. Once Prismatic Geoscope is in your graveyard and you control enough basic land types, you can tap Trazyn for a windfall of colored mana, spend two of that mana to untap him via the Scuttling Sliver ability, and repeat the process for infinite colored mana.