Everyone who thinks this is going to help you against combo decks, you are wrong.
Don't play Gnomish Vampire? Then your opponent draws cards A through X by the end of the match. Play it? Then they draw B through Y. Unless you hit X=30 and fatigue them (very difficult for a Warlock), then the odds of them hitting their combo are exactly the same regardless of whether you milled a card or not.
There are three upsides to playing this card: you increase your chance of fatiguing your opponent, you get to see one of their cards, and you psyche them out (as demonstrated by many of the posts here). You do not, however, decrease the average quality of their remaining deck.
3
That's really not saying much tbh
12
lol @ Unwilling Sacrifice
2
It would keep the deathrattle effect but I'm not sure it can buff itself.
1
Well that's exclusive to wild and wild's called wild for a reason. There are a ton of 3 drops in wild so the chances of that are slim. Plus it's only damage on your turn and Apothecary won't trigger from being summoned himself. So you can just not play anything else that turn or kill it 1st.