So maybe this card isn't completely terrible, since many of those aren't played because the cost is simply too high. This is like having an instant Shadowcaster, which made a lot of cool combos possible. Since it's a 1-mana 1/1 copy, I assume you could go infinite in standard with those minions via Valeera the Hollow and Zola.
Looks fun! Not all cards are intended for ranked play. Typically any time I'm struggling to come up with a fun casual deck, I throw "discover" into the search bar and see what comes up. This'll make my casual cut.
This card would be super interesting if it let you discover a battlecry minion from your deck. As it stands, there is far too much RNG for this to be good. Battlecry is likely the most common keyword in hearthstone so you'll get huge variance between good battlecries (Alex, Cube, Primordial) and bad ones (Doomguard, The Darkness).
I think the whole purpose of this card is to be played in a fun spirit of the shark deck. Drop spirit then next turn play this guy to discover 2 1mana minions with batttlecry (including another 1 of these possibly). Play them both which will double their battlecries.
Would have been better if you could play spirit and this card on same turn.