Requires

Eye of the Storm must be on the battlefield. Mind's Desire must be in hand. Mirror of Fate must be on the battlefield. Saheeli's Artistry must be in exile (exiled by Eye of the Storm). Brain Freeze must be in exile, or in the library. Mana needed:

Steps

1. Cast Mind's Desire for .
2. Eye of the Storm and Mind's Desire each trigger.
3. Resolve the Mind's Desire trigger, copying it zero times.
4. Resolve the Eye of the Storm trigger, exiling Mind's Desire, copying Mind's Desire and Saheeli's Artistry, and casting the Mind's Desire copy then the Saheeli's Artistry copy, targeting Mirror of Fate, without paying their mana costs.
5. The Mind's Desire copy triggers, creating an additional Mind's Desire copy for each spell cast before it this turn.
6. Resolve those copies, exiling random cards from your library that you may play this turn.
7. Resolve the Saheeli's Artistry copy, creating a token copy of Mirror of Fate.
8. Activate any Mirror of Fate by tapping and sacrificing it, exiling all cards from your library and putting Saheeli's Artistry from exile on top of your library.
9. Resolve the remaining Mind's Desire copy, exiling Saheeli's Artistry from your library and allowing you to cast it this turn.
10. Cast Saheeli's Artistry from exile without paying its mana cost, choosing any target.
11. Eye of the Storm triggers, exiling Saheeli's Artistry, copying Mind's Desire and Saheeli's Artistry, and casting the Mind's Desire copy then the Saheeli's Artistry copy, targeting Mirror of Fate, without paying their mana costs.
12. The Mind's Desire copy triggers, creating an additional Mind's Desire copy for each spell cast before it this turn.
13. Resolve these copies, failing to exile anything from your empty library.
14. Resolve the Saheeli's Artistry copy, creating a token copy of Mirror of Fate.
15. Repeat from step 8.
16. Once you have infinite storm count, repeat the loop but put Brain Freeze on top of your library with a Mirror of Fate activation in step 8.
17. Once Mind's Desire has exiled Brain Freeze, cast Brain Freeze from exile without paying its mana cost.
18. Brain Freeze and Eye of the Strom each trigger.
19. Resolve Brain Freeze's trigger, creating any number of copies of itself targeting any number of players.

Results