Puresight Merrow, Cryptolith Rite, and Thassa's Oracle

Prerequisites

• Puresight Merrow on the battlefield
• Cryptolith Rite on the battlefield
• Thassa's Oracle in hand
• available

Steps

1. Activate Puresight Merrow by tapping it, adding
2. Activate Puresight Merrow by paying and untapping it, exiling the top card of your library
3. Repeat until your deck size is less than or equal to 2 plus your devotion to blue
4. Activate Puresight Merrow by tapping it, adding
5. Cast Thassa's Oracle by paying
6. When it enters, it triggers, causing you to win the game

Results

• Exile your library
• Win the game