Scuttling Sliver + Trazyn the Infinite + Unnatural Selection + Sceptre of Eternal Glory

Scuttling Sliver

Trazyn the Infinite

Unnatural Selection

Sceptre of Eternal Glory

How it works

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

This fascinating engine revolves around Trazyn the Infinite absorbing the graveyard utility of artifacts while manipulating creature types to achieve an infinite mana loop. By utilizing Unnatural Selection, Trazyn temporarily becomes a Sliver, allowing it to inherit the activated untap ability granted to all Slivers by Scuttling Sliver. Meanwhile, Sceptre of Eternal Glory sits in your graveyard feeding Trazyn its massive three-mana production ability, giving you all the fuel you need to repeatedly pay the untap cost and generate infinite colored mana.