Three Blind Mice, Doubling Season, and Court of Vantress

Prerequisites

• Three Blind Mice on the battlefield
• Doubling Season on the battlefield
• Court of Vantress on the battlefield
• You are the monarch

Steps

1. At the beginning of your upkeep, Court of Vantress triggers, creating two token copies of Three Blind Mice
2. The Three Blind Mice tokens enter the battlefield with two lore counters on them due to Doubling Season, triggering their first and second chapter abilities
3. Resolve the first Three Blind Mice triggers, creating four 1/1 Mouse creature tokens
4. Resolve the next Three Blind Mice trigger, creating two token copies of a Three Blind Mice token
5. Repeat from step 2
6. Once you have infinite Three Blind Mice triggers, you may use them to copy any token(s) you control

Results

• Infinite copies of tokens you control
• Infinite creature tokens
• Infinite ETB
• Infinite Three Blind Mice tokens