I’ve been thinking about this spell for Shadow of the Demon Lord for a bit. Should it be alchemy or should ti be technology? How about it being a spell both could take?
TRANSFUSION TECHNOLOGY/ALCHEMY UTILITY 1
Target Two creatures within reach
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You quickly pull a connected series of tubes, needles, and vials from your pockets, jam one needle into one target and then another into the other. One target loses hit points equal to its healing rate. The other target gains gains hit points equal to double its healing rate. Roll a d20. On a one, instead of one target healing double, it loses hit points equal to its healing rate as the process works incorrectly and that character is racked with pain from a bad reaction.
Throat Punch Games 