Memory Crystal + Sage of Hours + Whim of Volrath

Mana needed: {U}{U}{U}{U}{U} every turn

U identity

Commander legal

The 3 combo pieces

• Memory Crystal
• Sage of Hours
• Whim of Volrath

How to execute it

1. Cast Whim of Volrath with buyback by paying {U}, targeting Sage of Hours.
2. Sage of Hours triggers, causing you to put a +1/+1 counter on it.
3. Resolve Whim of Volrath, returning it to your hand.
4. Repeat steps 1 through 3 four additional times.
5. Activate Sage of Hours by removing all +1/+1 counters from it, taking an extra turn after this one.
6. Repeat each turn.

What the combo produces

• Infinite turns
• Lock