Leech Bonder, Song of Freyalise, and Primal Vigor

Prerequisites

• Leech Bonder on the battlefield
• Song of Freyalise on the battlefield
• Primal Vigor on the battlefield

Steps

1. Activate Leech Bonder by tapping it, adding
2. Activate Leech Bonder by paying and untapping it, removing a +1/+1 counter from target creature and putting two +1/+1 counters on a different creature due to Primal Vigor
3. Repeat

Results

• Infinite +1/+1 counters