#i love digging into worldbuilding and what exactly the magical bullshit is capable of solving and defining the rules

[ragnarokhound]

can vamp Tim give Jason a blood transfusion if needed? 🤔

in your vamp/wer verse I mean

Oh, that's an interesting question! In my vampire!Tim/werewolf!Jason verse and the accompanying fic, Tim drinks almost exclusively off of Jason because a) Jason loves it and b) Tim would near-starve himself otherwise :') (and he kind of does anyway, Jason has to bully him into feeding). So the only blood inside Tim at any given moment is usually Jason's original blood anyway. But can Tim give that blood back in an emergency?

tldr: yes, under certain conditions. lol

My reply was getting long because this kind of speculating is my favorite game to play, so if you're curious about what those conditions are and how I reached that conclusion, more details are under the cut:

In this verse, Jason is the kind of werewolf who doesn't have a lot of control/retained personality when he shifts, but he DOES have a lot of meta powers. (As a treat for becoming a mindless, violent monster lol ur welcome Jay)

One of those powers includes rapid healing ala deadpool/wolverine (unless the wound is inflicted by silver, ancestral or otherwise) so it would be remarkably difficult for Jason to reach the point where he even needs a blood transfusion. But let's consider that worst case scenario, in which Jason has suffered enough silver-inflicted wounds that his healing factor breaks and he needs blood, yesterday. Wuh oh.

Tim is the #1 candidate to consider for a Jason blood transfusion because that's his gamer fuel of choice - but for Tim to be a viable donor, it would depend on the length of time it's been since Tim drank from Jason, and how much. They're on a time limit because Tim's body doesn't replenish blood on its own, he has to steal it.

Brace yourself for the suspect use of rough science facts in the middle of supernatural fantasy speculation about vampire/werewolf AUs, lmao

So supposing Jason has about 12 pints/5.7 L of blood in total, he could lose maybe 5 pints/2.4 L of blood at a time without dying (and that's a high estimate, he'd start going into shock way before that lmao), AND it would take him weeks to restore that blood - if he were human.

Luckily for Tim, he can steal quite a bit from Jason without killing him because of the handy dandy werewolf healing factor that restores Jason's blood almost as fast as Tim's dusty ass can absorb it. (Tim's veins @ Jason's blood: 𝔪𝔬𝔦𝔰𝔱𝔲𝔯𝔦𝔷𝔢 𝔪𝔢). Unluckily for Tim (and Jason), Tim has about a zillion hangups over drinking that much all at once. Aw.

A brief google search tells me that in an average human body, red blood cells live about 120 days. For simplicity, we'll say that Tim being a vampire and having weird vampire powers counteracts Jason being a werewolf and his blood having weird werewolf properties - so when Tim is full (and I mean full) of Jason's blood, he's good for somewhere just under that 120 days.

The blood isn't immediately starving in Tim's stupid vampire body because it's strong, sexy werewolf blood; it stays hydrated for a million years and could thrive like a dandelion in a crack in the sidewalk, let alone a perfectly good, albeit abandoned, vascular system. (Jason's blood @ Tim's veins: 𝒾𝓉'𝓈 𝒻𝓇𝑒𝑒 𝓇𝑒𝒶𝓁 𝑒𝓈𝓉𝒶𝓉𝑒)

That being said, Tim starts getting very hungry near the end of that time frame as the blood is used/dies, and that time frame shrinks every time he bleeds (which is often, RIP Tim). But he'd still have a solid month or so of healthy, viable Jason blood pumping through his undead ticker. (unless Tim gets REALLY beat up lol, which is not unlikely OTL)

SO all this to say: can Tim give it back?

I would say yes, IF Tim has fed recently, and he's fed A LOT. Otherwise, he just straight up might not have the blood to give anymore because his stupid husk of a body already used it all.

If he tried to give Jason blood around the time he's getting hungry again, when Jason's blood is on it's last legs after sustaining an active vampire without reinforcements for weeks to months, it wouldn't be as effective as a blood transfusion from someone who can make their own blood and therefore has a fresher supply.

tldr (again lol); Tim could become a blood donor for Jason, but only once he's regularly letting himself drink from Jason, and drinking until he's full.