That's correct. The concentration of magical energy in my blood reaches its peak at two am, so I must complete all my other daily activities and prep before then. Collection must be exact, and daily, to optimize the amount of usefulness I can pack into one jewel.

[Speaking of jewel... When the draw is complete, Rin sanitizes and bandages. After doing so, the mage carefully positions the needle and syringe over a diamond on the counter. Bit by bit she allows droplets of her blood to fall onto the gemstone. At first it seems nothing happens, but in a few moments time the gem actually absorbs the blood not unlike a sponge.]

I'll clean up shortly, and then we can pull out the food.