Mondrak, Glory Dominus + Collector's Vault + Clock of Omens + Krark-Clan Ironworks

Mondrak, Glory Dominus

Collector's Vault

Clock of Omens

Krark-Clan Ironworks

How it works

1. Activate Collector's Vault by paying 2 and tapping it, causing you to loot and create two Treasure artifact tokens.
2. Activate Clock of Omens by tapping the Treasures, untapping Collector's Vault.
3. Activate Krark-Clan Ironworks by sacrificing a Treasure, adding CC.
4. Repeat.

This clever loop turns Collector's Vault into a self-sustaining engine by utilizing Clock of Omens to untap it using the very artifacts it creates. While the Vault normally only makes a single Treasure token, Mondrak, Glory Dominus doubles that output into a pair of Treasures each time, leaving you with an extra token to spare. This surplus allows you to feed Krark-Clan Ironworks for a steady stream of colorless mana while digging endlessly through your library.