That's what Amadeus had figured. They'd have to work on hunting so that Rhys would be able to survive on his own but not this night. There were more pressing things they should go over first. Amadeus walked over and plucked the blood bag out of Rhys's hand. "Are you eating out of this like a heathen," he asked, his tone more teasing than appalled at the idea. He didn't wait for a reply before he brushed past the younger vampire and went in such of the kitchen, obviously expecting Rhys to follow him.
A few twists and turns into other rooms of the house later and Amadeus found what he was looking for. It wasn't much but then Kindred kitchens never were. Amadeus' own only held blood in the fridge as a backup reserve and glasses. "You can survive on bagged blood but as long as you survive on it alone you'll never be able to truly get anywhere with blood magic. As Tremere's we use up a longer supply of it in our own bodies which means that we have to feed more than any of the other clans," he explained as he rooted around in the cabinets until he found a mug. It would do.
"Because of that fresh blood is always best as it's more potent. Straight from the source. Kine blood is the usual but if you can get vitae from another vampire, even better." Amadeus popped open the blood bag and poured it into the mug before tossing the bag into the sink for now. Then he ran his bladed ring over the palm of his hand deeply enough that blood welled up in the palm of it and started to drip. It was blood that he let drip into the mug and mix with the other before he willed the cut to close. "The older the vitae, the stronger and more potent it is. Especially from a higher generation Elder."
A simple spell that he'd teach to Rhys later warmed the blood to the temperature it would be if it was fresh from the vein of a kine and finally handed it over to the fledgling.