-Snip-

I wonder if count hassildor is a pureblood vamp?

Imagine for a second the incredible strain that a transformation like that puts on your body. You're talking about a complete and total change in your physiology. Your bones shift, possibly break and are mended when placed in their new positions, you muscles expand, you grow entirely new bones, etc. That cannot be a painless and easy process. There's a reason that almost every werewolf movie shows the transformations as being incredibly painful. Now imagine something like that happening continuously within the confines of a few hours. Your heart would probably give out from the stress, as your heart rate is most likely hyper accelerated during this and your feeling all the pain that this transformation puts on your body. It taxes your heart, lungs, and mind, and could very well overload them if done too many times back to back. Your body consumes a lot of energy just powering your ordinary, day to day actions, and I can't imagine it'd find transforming to be easier.

-Snip-
Yes. The chest is the first thing to expand. http://www.uesp.net/wiki/Skyrim:Physicalities_of_Werewolves book explains it all. It shows how sick and twisted werewolf hunters and scientists can be.

I wonder if count hassildor is a pureblood vamp?

No

Who knows? I thought about it too. He was turned, along with his wife, but we were never told how, exactly. He embraced his vampirism, and hired the Pale Lady to collect blood for his wife.

Confirmation?

Who knows? I thought about it too. He was turned, along with his wife, but we were never told how, exactly. He embraced his vampirism, and hired the Pale Lady to collect blood for his wife.

On some of the loading screens it said count hassildor has been the count of skingrad for centuries and people thought he was a wizard because of it but he was a vampire.

Well guess you could be right, I just assumed that Janus and Rona was were infected by a regular Cyrodilic vampire.

Could something like this result in death if there's something that goes wrong like the heart beating too fast or something?

Probably.

I imagine that transforming into a werewolf is probably like running a marathon at a full sprint. You don't feel it in your beast form, likely because your body is producing huge amounts of adrenaline and the drive of your beastblood is keeping you on the move. However, I imagine transforming back and forth over and over would be akin to running a marathon at a full sprint, only to be tazzed and immediately forced to run another, without so much as a 30 second rest. It'd have to be a terrible strain on your body, and your rapidly beating heart could easily be overtaxed and possibly go into cardiac arrest.

And all this time we assumed the Volkihar lived under the ice . This brings about new possibilities.

I don't think so. In my opinion werewolves are immune to stuff like that, but I do think that their body can become spent after transforming so many times that they can no longer transform. But I doubt Hircine would let his greatest creation be killed by something as weak as cardiac arrest.

I'm not saying he isn't a pureblood vampire, but now that I think about it, I can't imagine Janus sacrificing a 1000 people or have molag bal [censored] him.

There are many ways of becoming a vampire other than being directly affected by Molag Bal or being bitten or scratched by another vampire.

I don't think so. In my opinion werewolves are immune to stuff like that, but I do think that their body can become spent after transforming so many times that they can no longer transform. But I doubt Hircine would let his greatest creation be killed by something as weak as cardiac arrest.

I was talking about him being a pureblood vampire, because if you were bitten or scatched wouldn't you be a halfblood?

I'm saying if it's done over and over within a the span of a few hours or even a few minutes, you could probably go into cardiac arrest before you actually finished your transformation. You're obviously vulnerable during your transformation, and if you're forced under that strain again and again and again, there's probably a breaking point where trying to transform wouldn't just fail, it could likely kill you.

Even companions cant control there lycantropy completely, Vikas says the call of blood is getting harder to control

I am pretty sure that means he just feels the urge to transform, and he really wants to transform, not that he does not have control over it.

I was talking about him being a pureblood vampire, because if you were bitten or scatched wouldn't you be a halfblood?

I think he's also afraid to transform. The beastblood is raging in him, and I think he's worried that if he does give in or is overpowered by it, he may not be able to come back.

not if you were bitten by a pureblood maybe a regular one but if you get bit by a pureblood then you probally will be a pureblood vampire also.

I want the option to turn whomever i want instead of a miscellaneous "Gift" quest.