Color Identity: G

Initial Card State
- Grim Monolith and Nyxbloom Ancient on the battlefield.
Steps
- Activate Grim Monolith's first ability by tapping it, adding ({9} magic symbol)
. - Activate Grim Monolith's last ability by paying ({4} magic symbol)
, untapping it. - Repeat.
Results
- Infinite colorless mana.
Bracket Tag
This combo has been estimated to be Ruthless (Bracket 4+).