+1

Yeah we clearly went different directions with the Invisible Stalker , but I like how yours ended up.

Talrand, Sky Summoner? Same mana cost, can replace Call of the Nightwing as it makes more, better tokens.

Bident of Thassa may also be good, but might be overkill with Curiosity.

AWESOME! sky summoner will be the next card I buy. Thanks for the idea! Replacing Inkfathom Infiltrator with Blighted Agent

Dimir Keyrune. It becomes an unblockable creature that is hard to remove, and of you cipher cards on to it, they will remain ciphered in it while it is not a creature.

Rocknj06 only issue with using Dimir Keyrune as a target for your cipher spells is that it essentially makes the spells cost 2 extra mana for the initial cast, which is simply too slow.

I would recommend Trepanation Blade just for the added damage not so much for the mill effect.

Also i highly recommend running 4x Hidden Strings and 4x Hands of Binding as those cards alone can cripple an opponent hidden strings can be amazing for untapping your lands to play the higher costed cards in the deck post combat phase.

TLDR

-2 Stolen Identity-2 Call of the Nightwing-2 Shadow Slice

+2 Hidden Strings+2 Hands of Binding+2 Trepanation Blade

Tormented Soul 1 to cast black so it might be faster if it helps at all :)

looks good you may wana try Triton Shorestalker

I don't think that Blighted Agent deserves a place in this deck, it's competing with your other unblockable damage dealers. You could go all out to infect though, Tainted Strike, Phyrexian Crusader and the like. I 100% agree with Tormented Soul with Triton Shorestalker being a much better alternative though.