2172862: .. and with cardsl ike water elemental and the like you can take protectors offline.
Actually water elementals (unlike frost shock) only removes the capacity to attack and do not remove the capacity to protect.
Glenn takes the effort to examine and suggest the potentiality of each card and he does offer some interesting ideas to use with Hildagard. However, the card itself had flaws which is already addressed by Glenn and members of the board. The problem being that it is
(a) too high cost
(b) requires other cards to support (minimum an attack boost. Ideally an attack boost, stealth and ferocity)
(c) Too low a health total (1 health!)
Relatively speaking, Debros Cousin-to-Moon is actually a better card as while it doesn't automatically win you the game. It is cheaper, doesn't require atk boost and is significantly easier to recurr. You can pull off a combo for him at a much earlier resource count than it takes you to do one for Hildagard.
One card was not mentioned which is actually rather good as with 1 resource, it can cover two areas in section (b). Obfuscate grants you an attack value and stealth.
If you do plan to try a deck around Hildagard, I would probably suggest Zomm Hopeslayer which offers some benefits as:
1) He is a rogue with access to Obfuscate, Purloins, Gouge etc etc...
2) He is Assassination spec. Resource acceleration anyone? *cough... synergy... Debros... cough*
3) He is an orc. No, I am not specist but some of the cards are...
Some people learn, some people don't. For me, I can never correct myself to say Julia Graves as opposed to Julia Roberts