Scurry Oak, and Cathars' Crusade

Prerequisites

• Scurry Oak in hand
• Cathars' Crusade on the battlefield
• available

Steps

1. Cast Scurry Oak by paying
2. When Scurry Oak enters the battlefield, Cathars' Crusade triggers, putting a +1/+1 counter on each creature you control
3. Scurry Oak's last ability triggers, allowing you to create a 1/1/ Squirrel token
4. When the Squirrel token enters the battlefield, Cathars' Crusade triggers, putting a +1/+1 counter on each creature you control
5. Repeat from step 3 until you end the loop by declining to create a Squirrel token

Results

• Infinite creature tokens
• Infinite ETB
• Infinite +1/+1 counters