Sacred Guide + Thassa's Oracle

Sacred Guide

Thassa's Oracle

How it works

1. Activate Sacred Guide for 1, exiling your library.
2. Cast Thassa's Oracle, winning the game on ETB.

This clever win condition centers on Sacred Guide, whose sacrifice ability lets you dig through and exile your entire library until you hit a white card. Because your library is now completely empty, you can safely cast Thassa's Oracle. When Thassa's Oracle enters the battlefield, its triggered ability checks your devotion to blue against the number of cards remaining in your library—which is zero—guaranteeing an immediate victory.