Polukranos, Unchained + Sage of Hours + Altar of Dementia + Yuna, Grand Summoner

Prerequisites

• You have at least six other cards in your graveyard.

Steps

1. 1Cast Polukranos Unchained from your graveyard for its escape cost by paying and exiling six other cards from your graveyard, causing it to enter the battlefield with twelve +1/+1 counters on it.
2. 2Activate Altar of Dementia by sacrificing Polukranos Unchained.
3. 3When Polukranos Unchained dies, Yuna triggers, putting twelve +1/+1 counters onto Sage of Hours.
4. 4Resolve the Altar of Dementia ability, causing you to mill cards equal to Polukranos Unchained's power.
5. 5Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least two extra turns after this one.
6. 6Repeat every second extra turn until you run out of cards to pay the escape cost.

Effects

• Lock
• Near-infinite turns