how many champions could possibly wield poppys hammer?
without, ya know. dieing right after.
my moneys on
or maybe
with the slight chance of
or 
without, ya know. dieing right after.
my moneys on
or maybe
with the slight chance of
or 
I bet that Poppy could possibly wield Poppys hammer... If she had one, because the one that she uses belongs to Olron.

I doubt Nasus or Ryze would have a need for Poppy's hammer
So we don't know why the warriors die though. We don't know if it's because of some enchantment on the hammer, or if it's because Poppy unwittingly inflates their ego by bestowing the hero's hammer on them, thus giving them delusions of grandeur and overconfidence in their abilities. So in theory, any champion could wield the hammer if it's simply Poppy inflating their egos by accident. And I'm hesitant to think it's an enchantment, considering Demacia's proximity and constant use of petricite in armor and weapons would have dampened or nullified any magic on the hammer entirely if one of their elite (like Garen) were wielding it.

Literally the only thing that can kill him is old age.
Thor can. Uhm...
Ornn... i mean
definitely
None, because if any other wielded it it wouldn't be Poppy's hammer anymore.
can pick up any weapon without dying.
It worked for Groot. Do not underestimate the power of growing back limbs.
Okay, real question: if you put Poppy's hammer in an elevator and it goes up, does that mean the elevator is worthy?
Ryze, lorewise, makes sense. We don't really know how many times he's saved the universe as we know it. As far as objective heroism goes, he's top dog.
probably garen
