@Marioland  
I didn’t make this for Dungeon Run. The design was inspired from the Cloak of Invisibility. I just adapted the effect into a more flavour appropriate way.

@Luxuria Unus  

 
Honestly, taking it into a dungeon run context makes it slightly sillier as there’s already an artifact that given all your things stealth in the Cloak of Invisibility, and it’s a passive on top of that so you’re not even sinking mana into it.
 
In a weaker Dungeon Run format I could see it being a Rogue thing, presuming that there’s a Stealth bucket in the mix, but it’s already sorta outdone by the cloak passive.

@Marioland  
This is definitely true, this one, I made with design in mind, more than balance. I just got the idea from the Dungeon Run, and thought of this. But I appreciate your insight nonetheless!

Either the quest would fail because your minions are too weak to trade out of Stealth, you get mowed down by Aggro/Tempo decks before you get enough Stealth minions out, or this finishes and you ride a broken combo that can’t be stopped by anything but non-targeted AOE and is non-interactive and a pain to fight against.
 
It allows all sorts of broken combos that can only be stopped with AOE (sometimes). On top of that it takes Stealth to activate it, and since a fair chunk of your deck is going to be the stealth minions that you need to get it working to begin with, giving them Stealth permanently is a bit meh given how Stealth minions are generally weak.
 
It’s an interesting idea, but it fails to understand the problem that they fixed by booting Conceal into the Hall of Fame set and attempts to bring it back in a way that’s entirely do-or-die.