This is the series of unfortunate events the deck tries to do on t3 or t4:
(1) cast possibility storm
(2) cast an adventure sorcery
(3) storm into enter the infinite
(4) cast walking ballista for 0
(5) storm into Borborygmos Enraged
(6) discard all your lands, which become lightning bolts -> win
The other cards are there to help this be a possibility:
we need a lot of mana, so we got all the dorks and rituals
we use fae of wishes to grab possibility storm from the sideboard
we use once upon a time to hunt for fae of wishes or a creature with a sorcery adventure or land depending on what we need
we use summoners pact to hunt for a creature with a sorcery adventure
we use pyretic ritual to be able to do the combo sitting on 5 mana (need 6 to cast storm and a sorcery on the same turn)
you can cast an instant with possibility storm on the board, you will eventually hit summoners pact and all the instants net you mana or cost 0 so the combo will work with an instant in hand as well (the line of play is much more complicated to work through, however)
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