Berta, Wise Extrapolator, Clockspinning, and Wizards of Thay

Prerequisites

• Berta, Wise Extrapolator on the battlefield
• Clockspinning on the battlefield
• Wizards of Thay on the battlefield
• available

Steps

1. Declare Wizards of Thay as an attacker, triggering its myriad ability, creating at least two token copies of it
2. Cast Clockspinning with buyback by paying due to each Wizards of Thay, putting a +1/+1 counter on Berta and returning Clockspinning to your hand
3. Berta triggers, adding
4. Repeat from step 2

Results

• Infinite +1/+1 counters on a creature
• Infinite magecraft triggers
• Infinite storm count