You've learned a lot about vampires now; some of it from research, some of it from hard-earned experience. Of course, this is not something you can be
absolutely sure about, it's not like you have a Monster Manual or something to refer to
First of all, Cerilian vampires are not all the same; it would seem they have some common characteristics, but some have powers that others do not. And the same goes for weaknesses.
General
- vampires retain the abilities they had in life; Adaliz was a sorceress, and could utilize those powers in undeath.
- scions that become vampires seem to retain their bloodlines; once again Adaliz is your reference.
- vampires are outwardly identical to humans; it is VERY difficult to spot them, although detect shadowtaint (detect evil) WILL work.
Other powers
- vampires are much stronger, tougher and faster than they ever were in life
- vampire can jump pretty far, and walk on roofs and walls as easily as on the ground
- vampires can change shape; or so you've heard, into wolves and such, but you've yet to see this happen.
- vampires can assume the form of mist and fly in this form; Robhan's opponent did this when he was on the verge of defeat
- at least some vampires can suck the life ut of the living with only a touch.
- all vampires can/must drink blood to sustain them
Resistances
- vampires seem almost immune to physical damage, and if hurt at all they recover with incredible speed.
- magic weapons and/or silver seem to have some effect, but exactly how much you're unsure - Bjorn has a magic sword, and he's been hacking away at the vampires, doing some damage, but not very much.
Weaknesses
- vampires CAN be turned or destroyed through divine channeling, but are very resistant to it (even the efforts of a group of powerful clerics, lead by a Sun priestess, only destroyed Medhlorie - the weakest vampire)
- vampires are hurt by fire; torches, burning oil, flaming swords, magic spells; they all harm them
- vampires are hurt by sunlight; but how much seems to vary from vampire to vampire, but haven't a lot of data to support this theory. In any even only true sunlight burns them enough to cause damage, but bright light can blind or nauseate them.
- staking a vampire (through the heart) doesn't seem to kill it (although Adaliz DID die), only immobilize it. And as Bjorn can testify to; wood probably works, but cold Rjurik steel is just as good
- decapitating a vampire (not easy unless its been staked) kills it; as does hacking it to pieces or otherwise inflicting truly massive physical trauma - but then again this would kill almost everything
'Reproduction'
- vampires can create other vampires; you have seen it happen. Medhloire got turned into a vampire (or so you think).
- vampires can create lesser spawn; these creatures have many of the same characteristics that vampires heavy, but are weaker and cannot create new undead.
'Servants'
- vampires can dominate the weak-willed; creating servants enslaved to their will
- vampires an summon aid from the 'creatures of darkness'; so far this has been fiendish worgs, giant bats, or dire rats.
I'll add more as I have time.