Grim Monolith + The Blackstaff of Waterdeep + Zirda, the Dawnwaker

Grim Monolith

The Blackstaff of Waterdeep

Zirda, the Dawnwaker

How it works

1. Activate Grim Monolith's first ability by tapping it, adding CCC.
2. Activate The Blackstaff of Waterdeep by paying 1 and tapping it, causing Grim Monolith to become an artifact creature until end of turn.
3. Activate Grim Monolith's second ability by paying 2, untapping it.
4. Activate Grim Monolith's first ability by tapping it, adding CCC.
5. Repeat from step 3.

This fascinating trio turns a dormant rock into a self-sustaining engine by cleverly manipulating artifact types and activation costs. While Grim Monolith naturally produces three colorless mana at the cost of refusing to untap itself normally, Zirda, the Dawnwaker steps in to discount that untap activation down to just two mana. Because Zirda's companion restriction is already met by this streamlined artifact package, you can continuously tap and untap the Monolith for a net profit of colorless mana. To bridge the gap, The Blackstaff of Waterdeep animates the Monolith into an artifact creature, allowing it to legally benefit from the very untap ability that breaks the loop wide open.