SUPER BUDGET(ish) (could cut a little down but still its pretty cheap) (propaganda could be cut to save a little more)
Deck focuses on either creatures that become copies of opponent's stuff, making tokens of their stuff, or straight up stealing it.
Card Reasoning:
AEtherspouts - good protection/psuedo wrath
Blue Sun's Zenith - Decent draw spell for the price level we are working at
Cackling Counterpart - Make a token, usually of an opponent's copied creature
Capsize - this card does work when you use the buyback.
Counterspell - this is a mono blue deck its mandatory
Desertion - Steal their stuff
Essence Scatter - counterspell duh
Evacuation - Blue wrath equivalent
Fated Infatuation - make a token of a big guy hopefully, possibly scry a lil
Frantic Search - card draw + could go mana positive with helm or sanctum
Gather Specimens - Steal their stuff, possibly a multiple things?
High Tide - we play 33 islands and have a high mana curve
Insidious Will - counters or changes a spells target, always fun
Mirror Match - good defensive spell, if a lil expensive mana wise
Negate - counter creature
Opportunity - draw some cards
Polymorphist's Jest - can be offensive or defensive pretty good
Pull from Tomorrow - good draw like Blue Sun's Zenith
Rapid Hybridization - good spot removal for creatures
Reality Shift - same thing but exiles so even better
Rewind - free counter spell basically
Arcanis the Omnipotent - draw and a copy target for more draw. unsure how great he is
Body Double - clone from any graveyard
Burnished Hart - ramp
Clone - clone
Cryptoplasm - clone
Deadeye Navigator - can blink stuff to change clone targets
Diluvian Primordial - steals spells and if you use it as a clone target the clones steal spells
Frost Titan - good clone target
Gigantoplasm - make big clones
Identity Thief - clone again
Invisible Stalker - good clone target for things like Gigantoplasm or Quicksilver Gargantuan
Mercurial Pretender - cloneeeeee
Mulldrifter - draw and clone it for more draw
Phyrexian Ingester - removal and then clone for a big guy
Quicksilver Gargantuan - big clone
Renegade Doppelganger - clone
Scourge of Fleets - Cyclonic Rift on a guy, that can be cloned to do it repeatedly
Shapesharer - clone once more
Stunt Double - clone
Vizier of Many Faces - final clone creature
Corrupted Conscience - steal a guy and maybe if its big enough kill someone with surprise infect
Followed Footsteps - make more tokens of good creatures
Jace's Sanctum - cheap spells + scrying is never bad
Mechanized Production - might be able to pull some clone silliness to win with this
Mystic Remora - really underrated draw card
Propaganda - protection
Blatant Thievery - steal stuff
Clone Legion - can come out of nowhere with this card if other people have a big board
Curse of the Swine - removal
Devastation Tide - board wipe
Rite of Replication - make a LOT of tokens
River's Rebuke - when one person's board specifically gets out of hand
Stolen Identity - tokens and Mechanized Production combo?
Treasure Cruise - no real graveyard interaction in this deck makes this a sweet draw spell
Conjurer's Closet - blink clones to change targets
Crystal Shard - same thing but bring them back to hand
Fellwar Stone - ramp
Helm of Awakening - with so many high mana cost cards, this seemed like a no-brainer
Mind Stone - ramp + draw when we need it
Mirage Mirror - clone effect and Mechanized Production combo technically :D
Sol Ring - sol ring duh
Soul Foundry - token generator of a clone or a big boy
i'm not sure how good this list is, its 2 am but it seems decent-ish?
