No Pick Pocket Tess Rogue Boomsday

It is a really fun deck to play, full of randomness. Some tempo mid game cause of Keleseth and Saronite to make sure you dont die to aggro.

This deck is really weak against rogue though, keep that in mind. But it can be good too since you can steal pretty much every spell from rogue class.

Card Summary:
Backstab: For early game removal etc
Shadowstep: Possible shadowstep on Tess to replay or whatever battlecry minion you have
Crystallizer: Nice to have armor instead of health for those Alexstraza decks out there, Also it may enable your random cards with armor if youre playing against warrior for example.
Deadly Poison: Really good cause you can stick it to your Spectral Cutlass
Hallucination: Thats what the deck is built around, random cards
Prince Keleseth: Not Ideal for the deck, since you want to have Pick Pocket, but this version of the deck is made around this to get power mid game
Blink Fox: Generally good card. 3/3 for 3 mana and you get a random card from your opponent’s class
Face Collector: Fun card to play with, you can get so many possible legendaries from other classes that may be replayed with Tess later-
Hench-Clan Thug: Good card to maybe snowball the early game with.
SI:7 Agent: Really good tempo card, good removal
Tar Creeper: Good against aggro decks
Academic Espionage: Didnt try this card too much, but it fits well with the theme of the deck. Also good against fatigue since you get more cards in your deck
Elven Minstrel: Good to draw your minions since this deck doesnt have much draw power
Saronite Chain Gang: Really good card with nice stats when you combo it with Prince Keleseth. 
Spectral Cutlass: Combos well with the deck since youre playing so many cards from your opponents class. Paired up with Deadly poison with shadow reflection too this can become a strong weapon.
Vilespine Slayer: Excellent card, can remove a big minion, or with Shadow Reflection you can kill more things.
Tess Greymane: Pretty much your late game, many possibilities with this card.
The Lich King: Good minion overall, and Tess Greymane casts your death knight cards.
Valeera The Hollow: Cause this death knight is a beast, you can play so much stuff out with this.