Shub-Niggurath

From http://www.cardgamed...ew-part-2-r1370
 

BanalityBob - 2/5 - Mama is really powerful. Really, really powerful, but she’s completely an all or nothing card. The domain that you’ve been ramping all game to get her out is going to be gone after she’s played, and a single Plague Stone can undo all your hard work and shove an 8 drop back on top of your deck. Dumping her out early on can win you the game really fast, but if your opponent can deal with what she brings to the table, you’re probably going to lose.
Danigral - 2/5 - The game could well be over by the time she can get into play for any meaningful effect. And Bob is right, Plague Stone is still very popular so all that card advantage will just be lost. You may be able to build your deck to take advantage of this earlier on - ramping, Arthur for reduction, and expensive impactful characters - but that’s a holy grail I think.
dboeren - 3/5 - This Shub is the equivalent of going all-in at the poker table. You’re gonna win big or lose big. Best thing to do I think is hang on to some cards to help you come back or cancel the effects that might ruin your day - things like Support destruction and Dark Rebirth (along with a keyword theme). Anyway, bound to be a fun deck even if a little risky.
Kamacausey - 2/5 - The all mother gets a 2 strictly because I like the artwork. She is pretty much a 1 if truth be told. She's too costly for what you're getting. Her artwork would make an awesome playmat, not so much a card... It's disappointing too because she's a fun ancient one. Her incarnation from the yuggoth contract cycle is just too hard to beat.
mnBroncos - 2/5 - This card is so sad to me ): I’d rather them have pushed her to the point that may needed to be restricted than getting this. Forces mono faction mainly, also won’t get into play until turn 5 maybe (although with that one guy can reduce her Automatically to 1 which is nice) But you lose all those resources and Plague Stone is way too common of a card that you can just end up losing everything. However, you can just win the game when this character hits the table.
Reckoner - 2/5 - This card is close to being good, but the biggest problem to me is that She costs way too much. And if you use reduction effects to get her out early, you do not get full use of her ability. I’d much rather run Dark Mistress of the Woods.

I'm convinced that this card works best with Shub characters who have "enters play" abilities.  (Currently, I'm trying her with Ancient Cthonian, Telepathic Cthonian, and Grasping Cthonian.)  That way, you're not just getting characters into play for free, but you're getting multiple Response abilities for free as well.  That can be a lot for an opponent to overcome when it happens all at once.

When combined with the Ancient Cthonian, you're looking at wave after wave of giant worms bursting onto the scene over multiple turns, just as I imagine Shub wants it.  Does it clog up your draw?  Sure, but you're playing Shub for the characters anyway, not the Supports and Events.  And with all the aforementioned "enters play" abilities, you already got a lot of triggered effects going off already.