Dour Port-Mage + Eternal Witness + Walk the Aeons

Dour Port-Mage

Eternal Witness

Walk the Aeons

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 Eternal Witness by paying its mana cost.
3. When Eternal 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 Eternal Witness from the battlefield to your hand.
6. Dour Port-Mage triggers, causing you to draw a card.
7. Repeat.

This cunning loop centers around chaining extra turns with Walk the Aeons, which is continuously fed back to your hand by Eternal Witness each time the creature enters the battlefield. To keep the engine running, Dour Port-Mage steps in with its active ability to bounce Eternal Witness back to your hand for reuse, while its passive triggered ability rewards all this movement by drawing you a card every time Eternal Witness leaves the battlefield without dying.