Amm, this is super interesting, but kinda RNG dependent. Where would I put this card into?
 I watched DT's video, great content as always. Gotta mention some things - 1) the animation is sick, 2) the card kinda looks niche, 3) I wouldn't put him in warlock, because the Possessed Lackey combo is stronger than Sense Demons combined with the Dollmaster Dorian's effect. I mean in the first case you are spending 6 mana to heal yourself by 8 and to put a minion with its original stats in play, you are also thinning your deck and thus improving your next draws. With the Sense Demons - you use 8 mana, 2 subpar cards and for what - for 2 1/1 Voidlords? You have 2 slow cards in hand and that's the best case scenario. Imagine drawing the demons before the whole combo. Nah, sorry, this doesn't sound that impressive to me.
The Elven Minstrel is a great way to activate his effect and I am definitely looking forward to play with this card in my casual rogue decks.
Dane, don't let us down. We expect some crazy videos featuring this legendary.