Dour Port-Mage + Temporal Manipulation + Shipwreck Dowser

Dour Port-Mage

Temporal Manipulation

Shipwreck Dowser

How it works

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

This elegant loop harnesses the recursion of Shipwreck Dowser to endlessly replay Temporal Manipulation, granting you infinite extra turns to dictate the pace of the game. While the Dowser handles the heavy lifting of pulling the sorcery back from the graveyard, Dour Port-Mage provides the engine's crucial card-drawing payoff whenever it bounces the Dowser back to your hand with its activated ability. It's a textbook example of transforming a simple bounce effect into a relentless, game-winning lock.