Regen blocking

Worse yet, the werewolf’s wound wouldn’t close! That wouldn’t be
so unusual when it was human, but once it assumed the beastly form, the
cells of a werewolf’s flesh were like single-cell organisms, giving it the
regenerative power of a hydra. Cells created more cells, closing wounds
instantly. But the blade the werewolf had just tasted made regeneration
impossible, though it was probably not due to the blade but rather the skill
of the youth who wielded it. Skin and muscle tissue that could reject bullets
weren’t showing any signs of regenerating!

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