Marwyn, the Nurturer, and Singing Bell Strike

Prerequisites

• Marwyn, the Nurturer on the battlefield
• Singing Bell Strike on the battlefield
• Singing Bell Strike attached to Marwyn
• Marwyn is untapped and does not have summoning sickness
• Marwyn has a power of at least seven

Steps

1. Activate Marwyn by tapping it, adding at least seven
2. Activate Marwyn by paying , untapping it
3. Repeat

Results

• Infinite green mana