Preserve Vitality

• You enchant up to 1 pint of freshly drawn blood, preventing it from spoiling or losing its vampiric nutritional potency. While preserved, this blood counts as a valid feeding source for abilities such as Blood Starvation. The blood must be enchanted within 1 hour of being drawn, and it must be kept sealed in the vial. If the vial is opened or destroyed, the enchantment ends immediately.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can preserve an additional pint of blood for each slot level above 1st.