I stopped watching the stream because of the Gold Cup (RIP), so I didn't get to see this card in action.
I'm just going to piggyback off of what (robik, I think) said: It's not that great. On one hand, it's a total win-more condition where if you don't remove it, suddenly your opponent is getting draws (and not even from their own deck) for just 2 mana, which is totally sick.
But a 4/5 body for 5 is on par with The Black Knight. (Oops, TBK is 6 mana)
This is a 7 drop, where it's like an azure drake, but it's not as good. it's a legendary, so can only have 1 in deck... random spell could be real bad/useless... unlikely to get multiple draws out of it, or the game spirals out of control anyway...
double checked my collection, darkscale healer is a 5 mana 4/5, and it technically does something when it comes into play. is this card really better than it? i don't think so.
count me on the 'this card is bad' train.