Basalt Monolith + Heartstone + Tezzeret, Betrayer of Flesh

Prerequisites

• Tezzeret has at least two loyalty counters on it.
• Basalt Monolith does not have summoning sickness.

Steps

1. 1Activate Tezzeret's second loyalty ability by removing two loyalty counters from it, causing Basalt Monolith to become an artifact creature.
2. 2Activate Basalt Monolith's first ability by tapping it, adding .
3. 3Activate Basalt Monolith's second ability by paying , untapping it.
4. 4Repeat from step 2.

Effects

• Infinite colorless mana