Do not get wrong, I'm absolutely not a fan of liches.

[They're the worst, even if Barry is also one now, but that's... something that needs to be fixed at some point.]

But if Lup was worried enough to mess around with that kinda necromancy - which I wouldn't put beyond her if only cause it's so fucking dramatic - the umbrella could be her phylactery. I just don't know how to figure out if it is.