Oops All Spells! (Legacy)

Oops All Spells is a combo deck that tries (and succeed) to win on the first turn.

What you need?

• 4 mana (1 Black) = Lotus Petal + Elvish Spirit Guide + Simian Spirit Guide + Dark Ritual + Cabal Ritual + Summoner's Pact (for Elvish or Wild Cantor) + Chrome Mox
• 1 Balustrade Spy or Undercity Informer

When you have these you can combo out, but how?

Cast Balustrade Spy (or Informer), flipper your deck in graveyard cause you have no lands, get Narcomoeba on the battlefield, strip your opponent's hand by flashing back Cabal Therapy (use them but one), Bridge From Below net you some creature to fuel Dread Return, cast it bringing back Underworld Cerberus, sac it to the last Cabal Therapy, return all creature to your hand, exile all Spirit Guide gaining some mana, cast Wild Cantor and sac it for blue, cast Laboratory Maniac, draw cards with Street Wraith and win!

For the sideboard plan, side out all combo pieces (including Balustrade Spy and Undercity Informer) and side in the whole sideboard.
It's more difficult to win turn 1 because you have to reach 7 mana to belcher your opponent but it can be done. With this transformational sideboard you dodge graveyard hate in G2 or G3.
(expensive version uses Lion's Eye Diamond to reach 7 mana considering that you reach 4 normally with the deck)