Sage of Hours, Big Mother Mouser, and Resourceful Defense

Prerequisites

• Sage of Hours on the battlefield
• Big Mother Mouser on the battlefield
• Resourceful Defense on the battlefield
• each turn available

Steps

1. Declare Big Mother Mouser as an attacker, triggering its ability, doubling the +1/+1 counters on it
2. Activate Resourceful Defense by paying , moving five +1/+1 counters from Big Mother Mouser to Sage of Hours
3. Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one
4. Repeat each turn

Results

• Infinite turns
• Lock