Basalt Monolith + Agatha of the Vile Cauldron + Ensoul Artifact

Basalt Monolith

Agatha of the Vile Cauldron

Ensoul Artifact

How it works

1. Activate Basalt Monolith's first ability by tapping it, adding CCC.
2. activate Basalt Monolith's second ability by paying at most 2, untapping it.
3. Repeat.

By weaving together this unlikely trio, we turn a rigid stone into a magnificent engine of infinite colorless mana. The trick begins with Ensoul Artifact breathing life into Basalt Monolith, transforming the heavy mana rock into a 5/5 creature so it can leverage its own newfound properties. With Agatha of the Vile Cauldron on the field acting as a legendary mentor, her passive ability reduces the cost of creature activated abilities based on her power, turning the Monolith's {3} untap cost into a mere {2}. Because tapping the Monolith yields three mana while untapping it only costs two, the loop becomes self-sustaining and endlessly repeatable.