Hi, I'm running a game in which the characters will be facing off against a bunch of vampires. The vampires have the energy drain ability which states (from the 3.5 SRD) that "Living creatures hit by a vampire’s slam attack (or any other natural weapon the vampire might possess) gain two negative levels. For each negative level bestowed, the vampire gains 5 temporary hit points. A vampire can use its energy drain ability once per round."
I can't find any rules on temporary hit points stacking in PFRPG, but I seem to recall that in 3.5 the rule was that each instance of something that grants temporary hit points overlaps with previous instances. What I'm wondering is how exactly the energy drain temporary hit points would work...is each attack that bestows two negative levels a single instance and the vampire gains 10 temporary hit points which are replaced by the next successful energy draining attack? Do the points accumulate without limit? I'm just not clear on exactly how this is supposed to function, so if anyone has any rules they can point me to or opinions to offer I'd appreciate hearing about it. Thanks in advance for your help and/or advice.
