Is the damage from "Surrounded By Nightmares" (off Tantrum upgrade) a single instance of damage or multiple instances? Example would be that either:
a ) it deals 1 damage at a time for each Nightmare within 3" and LOS of the target, thus being better against things like Hard to Kill and Soulstone use.
b ) it counts the number of nightmares within 3" and LOS of the target, then deals the damage as one lump sum, thus being better against things like Arcane Shield.
Similar question regarding Lynch's 52 Pickup.
Wording for relevant abilities:
"Target model suffers 1 damage for each Nightmare within 3" and LOS of it which it considers an enemy."
"Target model with the Brilliance Characteristic within 6" suffers 2 damage for each Ace revealed in this way."