@Sydxelia  
Is Cadence old? No? You can use that argument if she actually stops being young, but not before.

Oh yeah….immortality huh……being a princess isn’t as much fun as you thought it would  
Now that your friends are gone….look I know I should feel sad, and I do but….I don’t kno…I don’t know anymore

And you will never get married.
 
 
@Background Pony  
Dragons live forever, according to Puff, The Magic Dragon. :P

@Sydxelia  
for now  
maybe it’s just an age to a certain point then stop deal

@Background Pony  
Dragons live long enough that 100 years is “nap” to them.

Being an alicorn doesn’t automatically make you an immortal. Look at Cadance. She seems to be aging at a normal rate.

Where is Spike’s tomb?