Grolnok, the Omnivore, Thassa's Oracle, Mesmeric Orb, and Basalt Monolith

Prerequisites

• Thassa's Oracle in library or in exile with a croak counter
• All other permanents on the battlefield
• available

Steps

1. Activate Basalt Monolith by tapping, adding
2. Activate Basalt Monolith by paying , untapping it
3. Mesmeric Orb triggers, causing you to mill a card
4. Whenever a permanent card is put into your graveyard, exile it with a croak counter
5. Repeat step 1 through 3 until your devotion to blue is greater than or equal to the number of cards in your library
6. Cast Thassa's Oracle from exile by paying
7. Thassa's Oracle enters the battlefield, winning you the game

Results

• Win the game