Chira, All In, and Frenetic Efreet

Prerequisites

• Chira, All In on the battlefield
• Frenetic Efreet on the battlefield

Steps

1. Activate Frenetic Efreet an arbitrarily large number of times by paying
2. Resolve a Frenetic Efreet ability, flipping a coin
3. Chira triggers, putting a +1/+1 counter on it and creating a tapped Treasure token
4. Repeat from step 2

Results

• Infinite +1/+1 counters on a creature
• Infinite artifact ETB
• Infinite artifact tokens
• Infinite tapped Treasure tokens