Haven't commented yet, but I shall now :U
First off, what is a deathstalker?
A 0|1 card that costs 2
and essentially gains 2 atk per turn if it is buffed.
Unless you're going for thematicness, I don't think blessing is probably a good choice for a buff. I would personally take momentum, since its cheaper cost allows it to be splashed, as well as allowing you to bypass shields like wings or dimensional.
Hover over cards for details, click for permalink
52q 52u 52u 52u 52u 52u 52u 55q 55q 55q 55q 55q 55q 8pl
6 creatures is hardly a deck, so you want to focus on the poison aspect. Remember, deathstalker is a variant of poison, which means killing the opponent slowly. Consider adding the following cards for more defense:
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52l 52o 52r 55t 8pl
Skull shield and bonewall provide decent defense, poison speeds up kill, and gravity pull can be used to block an attack (and sacrificing a scorpion) to induce a death effect, which combos nicely with bonewall.