Scuttling Sliver + Trazyn the Infinite + Dreamstone Hedron + Amoeboid Changeling

Scuttling Sliver

Trazyn the Infinite

Dreamstone Hedron

Amoeboid Changeling

How it works

1. Activate Amoeboid Changeling by tapping it, 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 hinges on Trazyn the Infinite absorbing the activated abilities of artifact cards in your graveyard, specifically the three-mana generation of Dreamstone Hedron. Because Amoeboid Changeling can tap to grant all creature types to target creatures, it turns Trazyn into a Sliver, instantly unlocking Scuttling Sliver's graveyard-accessible untap ability. With Trazyn now able to untap itself for just two mana using Scuttling Sliver's granted text, you can repeatedly tap Dreamstone Hedron for massive colorless mana and endlessly untap Trazyn to net infinite colorless mana.