I agree to most of the points NG said.
Crypt sentry must become more expensive... and less bricks-orientated. I like, that it "uses" the full hand. So it is more fruitful, to "collect" the undead... or as opponent "kill" them with holy or fire. Maybe also a Stock + undead/2 would help out... cost then 5b,2r.
The
countess is okay for me... you really only get the magic+ if you have (almost) a full hand. Maybe "cripple" her by giving magic+ only with full undead hand.
Crypt could be crippled (bad pun), by giving max 5 of each ressource... that way it would be "okay". (imo)
Necromancer: Yeah... maybe if you don't give no cost of the card, it would be more fair... as undead rares can be summoned easily via necromancy :-/
Undead host is "freaking" expansive"... with a crippled Sentry, it would be fine, I think...
BUT:IMO the killer is
DEATH WAVE:
7 gems doing "always" 20 damage... for a common!! So why waiting for the vampire with its nasty side-effects, when inflicting damage is
commonly so easy?!
I had so many games recieving 2-3 death waves in a row (or playing them... the more pleasant way)... thats 60 damage for 21 gems... so why summoning dragons??
Finally concerning holy decks:
Without their soldier-synergy, holy decks wouldn't stand undead decks normally (that's my opinion)... I challenge every holy-deck without soldiers with my undead, and I think, I will have very good chances, although my undead deck is one of the less powerful undead decks, played here...
My little "undead-story"...
for those who are interested:
When I began playing here, the third deck I created was an undead deck... It was built very fast, as there are many undead-keyword-cards... and it stroke very effective. Compared to the other two decks I already had, no "fine-tuning" was needed... it had the best win-loss ratio... this made me a bit sad and I took a rare out of it, so it was not playable anymore. Today, as I see, that this game is not perfectly balanced (how should it!) I rearranged the undeads... but still feel the pain of my opponents, when they have no holy in deck...
btw. I think similar about holy-soldiers. The synergy-effects of some of this cards are too strong... but that's a different story