***TRIALS RESPONSE***Looks like a pretty solid deck, though there are a few things to tweak/consider.
For one thing, the splash for Nightmares seems a little our-of-place. I suppose it's like a simple splash for something like RT or Lightnings, but it
s generally a better idea to go for a splash that will complement the rest of the deck better and create synergy. For example:
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This change, while simple enough, merely subbing out the Nightmares for Lightnings (Which I upgraded in the pic but could easily be unupped, just less efficient if so) on the whole rounds the deck off a lot better. In the first model the only way you could reliably create death effects was to play Sparks, which while good, simply do 3 damage and then pump your Condors/Bone Walls. Lightnings, however, are much more efficient. You can not only kill an enemy creature that threatens your Wall or life total, but use that to also proc death abilities.
If you want to stay with the idea of Death/Darkness, though, Bloodsuckers allow you to not only proc death effects and kill enemy creatures like Lightning, but also act as a source for small but significant attackers throughout the game.
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The Vampire Daggers do a whole lot, making 12-point swings of damage every turn for a mere
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. One Nightmare was included because they're so fun, and sadly some Sparks had to be cut in the final list to make room for additional quanta.