Agatha's Soul Cauldron + Sage of Hours + Sprout Swarm + The Thing

Mana needed: {4}{R}{G}{G}{W}{U} at most each turn

RGWU identity

Commander legal

The 4 combo pieces

• Agatha's Soul Cauldron
• Sage of Hours
• Sprout Swarm
• The Thing

What must be in place

An opponent cannot block and kill The Thing.

How to execute it

1. Cast Sprout Swarm with buyback by paying at most {4}{U}, 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. Its second ability triggers, causing you to pay {R}{G}{W}{U} to double the number of +1/+1 counters on it.
4. 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.
5. Repeat each turn.

What the combo produces

• Infinite turns
• Lock