Cast Approach of the Second Sun by paying {6}{W}, causing you to gain 7 life and put Approach of the Second Sun into your library seventh from the top.
Cast Mystical Tutor by paying {U}, searching your library for Approach of the Second Sun and putting it on top of your library.
Draw Approach of the Second Sun from your library.
Cast Approach of the Second Sun by paying {6}{W}, causing you to win the game.

Win the game

Approach of the Second Sun

Mystical Tutor

Cast Nexus of Fate by paying {5}{U}{U}, granting you an extra turn after this one and shuffling it into your library.
Activate Isochron Scepter by paying {2} and tapping it, casting Mystical Tutor, putting Nexus of Fate on top of your library.
Move to your next turn.
Draw Nexus of Fate from the top of your library.
Repeat.

Infinite turns

Skip your draw step

Nexus of Fate

Isochron Scepter

Cast Beacon of Tomorrow by paying {6}{U}{U}, granting you an extra turn after this one and shuffling it into your library.
Activate Isochron Scepter by paying {2} and tapping it, casting Mystical Tutor, putting Beacon of Tomorrows on top of your library.
Move to your next turn.
Draw Beacon of Tomorrows from the top of your library.
Repeat.

Beacon of Tomorrows

Cast Seasons Past by paying {4}{G}{G}, returning Mystical Tutor, Time Warp, and any number of cards with different mana costs to your hand and putting Seasons Past on the bottom of your library.
Cast Mystical Tutor by paying {U}, putting Seasons Past on top of your library.
Cast Time Warp by paying {3}{U}{U}, granting you an extra turn.
In the draw step of your next extra turn, draw Mystical Tutor.
Repeat each turn.

Time Warp

Seasons Past

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

Zethi, Arcane Blademaster

Cast Seasons Past by paying {4}{G}{G}, returning Mystical Tutor, Temporal Manipulation, and any number of cards with different mana costs to your hand and putting Seasons Past on the bottom of your library.
Cast Mystical Tutor by paying {U}, putting Seasons Past on top of your library.
Cast Temporal Manipulation by paying {3}{U}{U}, granting you an extra turn.
In your next extra turn's draw step, draw Seasons Past.
Repeat each turn.

Temporal Manipulation

Cast Capture of Jingzhou by paying {3}{U}{U}, taking an extra turn after this one.
Cast Mystical Tutor by paying {U}, searching your library for Seasons Past and put into your hand.
Cast Seasons Past by paying {4}{G}{G}, returning Mystical Tutor and Capture of Jingzhou to your hand and putting Seasons Past to the bottom of your library.
Repeat.

Capture of Jingzhou

Cast Seasons Past by paying {4}{G}{G}, returning Walk the Aeons, Mystical Tutor, and any number of cards with different mana costs to your hand and putting Seasons Past on the bottom of your library.
Cast Mystical Tutor by paying {U}, putting Seasons Past on top of your library.
Cast Walk the Aeons by paying {4}{U}{U}, granting you an extra turn.
In the draw step of your next extra turn, draw Seasons Past.
Repeat each turn.

Walk the Aeons

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.
Declare Zethi as an attacker.
Zethi's second ability triggers, creating a copy of Mystical Tutor and causing you to pay {U} to cast it.
Resolve the copy of Mystical Tutor, causing you to search your library for Beacon of Tomorrows and put it on top of your library.
Move to your extra turn, causing you to draw Beacon of Tomorrows during your draw step.
Repeat.

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.
Deal combat damage to an opponent using the creature that has Spellbinder attached.
Spellbinder triggers, casting a copy of Mystical Tutor without paying its mana cost.
Resolve the copy of Mystical Tutor, searching your library for Beacon of Tomorrows and putting it on top of your library.
Move to your next turn, drawing Beacon of Tomorrows during your draw step.
Repeat.

Combos with "Mystical Tutor"