Dour Port-Mage + Scholar of the Ages + Walk the Aeons Combo

Dour Port-Mage on the battlefield.

Scholar of the Ages and Walk the Aeons in hand.

available plus enough mana to cast Walk the Aeons and Scholar of the Ages each turn.

Cast Walk the Aeons by paying its mana cost, causing you to take an extra turn after this one.

Cast Scholar of the Ages by paying its mana cost.

When Scholar of the Ages enters the battlefield, it triggers, returning Walk the Aeons from your graveyard to your hand.

Move to your next turn.

Activate Dour Port-Mage by paying and tapping it, returning Scholar of the Ages from the battlefield to your hand.

Dour Port-Mage triggers, causing you to draw a card.

Repeat.

Infinite turns

Lock