Stripetail smiled as he pulled the knife out of Arvens and showed it to him." Look no blood. And the wound you gave yourself is healing. Immortals heal very quickly Arvens. Now, you've taken one dose, Not enough to give full immortality, but enough to protect you from getting stabbed or shot. The effects of the drink will last a few seasons, probably ten at the most. So enjoy it. I'll try to make a better tasting serum, but I can't make any promises.
Nick"