No it cannot happen . Originals are immortal , the siphoner would most likely die because they can’t absorb that much power at once . I think a siphoner can only absorb certain amounts of power . They can weaken normal vampires fine because they don’t have much power . But it would take a lot to siphon all of the power of an Original Vampire . They were created with a powerful spell so yes they can be siphoned, just not to the point of death .
