Hearthpwn

Turn 10: Glinda + Baleful Banker in your hand > play Glinda, then the Banker on Glinda, then the copy of the Banker with echo in your hand on the Banker you just played. It avoids you from dying to fatigue damages.
Turn 10: Glinda and Gnomeferatu mills two cards from your opponent. I agree that it's not quite amazing, far away from that, but it still feels like an interesting interaction (maybe with some portals?). I'm a greedy player, so it's a synergy I'm really looking forward trying in-game (if Glinda survives, you could play multiples waves of milling).

Bloodbloom is there to help you with Rin/Nether.

I really want to run an ooze (Cubelock will certainly reign on the meta), but I don't find a slot for it. Feel free to let me a message about which card I should replace it with.

PS: the decklist lacks some good even cards with lifesteal to play alongside the spellstones. Unfortunately, I didn't find any except the Inquisitor (you know, this terrible trash 1-6 with taunt and lifesteal for 4 manas. FeelsBadMan - but it's a demon, it could come back with Gul'dan!, so it may not be that bad... I guess... no just forget what I said.).

Updates >>>
1) I decided to go with the Drain Soul/Thalnos (which is not the best, but still grants some tempo/life gain). Thalnos is also quite good with our aoe and synergizes well with the Handlock strategy (draw is always welcome and potion of madness is rotating out, there're no reasons not to include Thalnos here).
2) I sadly decided to cut one of our friend the Baleful Banker because it seems a bit too slow against Midrangy/Aggroish archetypes. The interaction with Glinda doesn't make it a reasonable enough since it doesn't single-handy win you games but just prevents you few damages.