Zethi, Arcane Blademaster, Beacon of Tomorrows, and Mystical Tutor

Prerequisites

• Zethi, Arcane Blademaster on the battlefield
• Beacon of Tomorrows in hand
• Mystical Tutor in exile
• Zethi does not have summoning sickness and cannot be blocked and killed by an opponent
• each turn available

Steps

1. Cast Beacon of Tomorrows by paying , causing you to take an extra turn after this one and shuffle Beacon of Tomorrows into your library
2. Declare Zethi as an attacker
3. Zethi's second ability triggers, creating a copy of Mystical Tutor and causing you to pay to cast it
4. Resolve the copy of Mystical Tutor, causing you to search your library for Beacon of Tomorrows and put it on top of your library
5. Move to your extra turn, causing you to draw Beacon of Tomorrows during your draw step
6. Repeat

Results

• Infinite turns
• Skip your draw step