The Demon Seed

All cards are selected for their mana efficiency.

100% Core in the deck:

*Arasani is a 0 mana heal 4, add a 4/6 taunt for 6 to your hand. 0 mana heal 4 is very good, we don't care about the body

Questionable cards in this deck:

Blood Shard Bristleback - Can we activate this? Do we even care? We might be winning too hard by the time this activates. A likely cut, but I'll test it at the start because healing can win games vs aggro.
Runed Mithril Rod - Is this good enough, or is Darkglare better? Maybe we play both?
Soup Vendor - A meme or the nuts? Remember it activates on the first 2 steps of the quest completion and Aranasi Broodmother. If we can draw 2 off this we are happy I think. Tour Guide comes in clutch for this.
Tamsin Roame - Worth playing at all? Rod may interfere too much by making our cheap shadow spells cost 0.
Drain Soul - I think it strongly depends on wether Soup Vendor is playable or not. Healing is only secondary to self damage. This is single target removal spell #7 and #8 and the other spells do their job better. A Likely cut

Cards I have my eye on:

Mistress of Mixtures - extremely mana efficient healing, can trigger Soup Vendor, can even self-trigger it with Touch of the Nathrezim. The biggest downside I see here is polution for Raise Dead.
Tinkmaster Overspark - We never have much of a board to care about, and this deals with Big Shaman and Rezz Priest somewhat. Is that enough to care about though?
Defile - A control warlock staple. I'm not convinced that we need it, Soul Rend looks strong enough.
Bloodbound Imp - While it does have good stats, I think it is more cute than good
Darkglare - I'm not convinced we need this, but I won't be surprised if it finds a spot.
The Soularium - Very efficient draw, looks like it goes great with Runed Mithril Rod
Unlicensed Apothecary - I don't think this deck needs to worry about closing out the game extra fast once the quest is completed, but if it does this is the card that does it.