Scuttling Sliver + Trazyn the Infinite + Amorphous Axe + Mana Vault

Scuttling Sliver

Trazyn the Infinite

Amorphous Axe

Mana Vault

How it works

1. Activate Trazyn using Mana Vault's ability by tapping it, adding CCC.
2. Activate Trazyn by paying 2, untapping it.
3. Repeat.

This clever loop turns the graveyard into an engine by letting Trazyn the Infinite inherit the activated abilities of every artifact resting within it. Thanks to Amorphous Axe making Trazyn a Sliver, Scuttling Sliver grants him the crucial untap ability he needs to cycle infinitely. With those pieces aligned, you can repeatedly tap Mana Vault for three colorless mana and use two of them to untap Trazyn via the Sliver's ability, generating an infinite surplus of colorless mana.