The Thing, Agatha's Soul Cauldron, Sage of Hours, and Mystic Speculation

Prerequisites

• The Thing on the battlefield
• Agatha's Soul Cauldron on the battlefield
• Sage of Hours in exile
• Mystic Speculation in hand
• each turn available

Steps

1. Cast Mystic Speculation with buyback by paying , returning it to your hand
2. At the beginning of your combat phase, The Thing's first ability triggers, putting four +1/+1 counters on it
3. Declare The Thing as an attacker
4. Its second ability triggers, causing you to pay to double the number of +1/+1 counters on it
5. Activate The Thing using Sage of Hours' ability by removing all +1/+1 counters from it, causing you to take an extra turn after this one
6. Repeat each turn

Results

• Infinite turns