A New Era of Collapse

Looking for a Honkai Novel Where the Male Lead Uses His Own Blood to Make Medicine for the Valkyrie

I read a Honkai novel a while ago that I can't quite remember. The male lead transmigrated twice, the first time into the Honkai world. There, he used his own blood to make potions for the Valkyries. Seele often acted spoiled around him, but every time she did, Bronya would beat him up.