Scuttling Sliver + Trazyn the Infinite + Dreamstone Hedron + Unnatural Selection

Scuttling Sliver

Trazyn the Infinite

Dreamstone Hedron

Unnatural Selection

How it works

1. Activate Unnatural Selection by paying 1, causing Trazyn to become a Sliver until end of turn.
2. Activate Trazyn using Dreamstone Hedron's ability by tapping it, adding CCC.
3. Activate Trazyn by paying 2, untapping it.
4. Repeat from step 2.

This clever loop transforms Trazyn the Infinite into a self-contained mana engine by raiding your graveyard for Dreamstone Hedron, whose activated mana ability Trazyn borrows thanks to Prismatic Gallery. To make this work, Unnatural Selection temporarily turns Trazyn into a Sliver, granting it the untap ability printed on Scuttling Sliver. By tapping Trazyn for three colorless mana via the Hedron's ability and then spending two of that mana to untap it with the Sliver's ability, you net one colorless mana with every iteration.