Sage of Hours + The Ten Rings + Aeromoeba + Stark's Ingenuity

Sage of Hours

The Ten Rings

Aeromoeba

Stark's Ingenuity

How it works

1. If you have six or more cards in hand, activate Aeromoeba by discarding a card.
2. Repeat step 1 until you have five or fewer cards in hand.
3. At the beginning of your end step, The Ten Rings triggers, causing you to draw cards until you have ten cards in your hand.
4. Stark's Ingenuity triggers for each card drawn, putting that many +1/+1 counters on Sage of Hours.
5. Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one.
6. Repeat each turn.

This clever combo hinges on carefully curating your hand size so that The Ten Rings triggers during your end step to draw a massive influx of cards. As you draw those cards, Stark's Ingenuity rewards you by triggering for each one, stacking a mountain of +1/+1 counters onto Sage of Hours. You can then cash in those counters using Sage of Hours's ability to chain endless extra turns, all while Aeromoeba stands ready in the graveyard or your hand to help sculpt your hand size beforehand if needed.