Dour Port-Mage + Walk the Aeons + Timeless Witness

Dour Port-Mage

Walk the Aeons

Timeless Witness

How it works

1. Cast Walk the Aeons by paying its mana cost, causing you to take an extra turn after this one.
2. Cast Timeless Witness by paying its mana cost.
3. When Timeless Witness enters the battlefield, it triggers, returning Walk the Aeons from your graveyard to your hand.
4. Move to your next turn.
5. Activate Dour Port-Mage by paying 1 and tapping it, returning Timeless Witness from the battlefield to your hand.
6. Dour Port-Mage triggers, causing you to draw a card.
7. Repeat.

By looping Walk the Aeons alongside Timeless Witness, you generate infinite extra turns, as Timeless Witness continuously plucks the spell back from your graveyard upon entering the battlefield. Dour Port-Mage plays a crucial double agent here: its activated ability repeatedly bounces Timeless Witness back to your hand to re-trigger its recursion, while its passive triggered ability ensures you draw a card every single time that creature leaves the battlefield without dying.