Basalt Monolith, Animating Faerie // Bring to Life, and Heartstone

Prerequisites

• Basalt Monolith on the battlefield
• Animating Faerie // Bring to Life in hand
• Heartstone on the battlefield
• Basalt Monolith does not have summoning sickness
• available

Steps

1. Activate Basalt Monolith's first ability by tapping it, adding
2. Cast Bring to Life by paying , making Basalt Monolith a 0/0 artifact creature and putting four +1/+1 counters on it
3. Activate Basalt Monolith's last ability by paying , untapping it
4. Activate Basalt Monolith's first ability by tapping it, adding
5. Repeat from step 3

Results

• Infinite colorless mana