How can you create a combo with Zethi, Arcane Blademaster, Beacon of Tomorrows, Mystical Tutor?
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[START OF COMBO]This combo can be formed with Zethi, Arcane Blademaster, Beacon of Tomorrows, Mystical Tutor

Color identity: WU
Mana cost: {6}{U}{U}{U} each turn
Steps:
  1. Cast Beacon of Tomorrows by paying {6}{U}{U}, 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 {U} 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.[END OF COMBO STEPS]

Result:
  - Infinite turns
  - Skip your draw step[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Zethi, Arcane Blademaster must be on the battlefield
  - Beacon of Tomorrows must be in your hand
  - Mystical Tutor must be exiled
  - Zethi does not have summoning sickness and cannot be blocked and killed by an opponent.
[END OF COMBO PREREQUISITES]
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