Monoxide
To be immortally, is really the definition of watching everything perish and become a distant memory…
It’s a gift and a curse, never ending cycle of witnessing repeat of those who you loved dearly passing away, with every new friend if they aren’t immortal they shall too pass
Being immortal is such gateway into insanity and losing yourself when you are not ready, in fact enough to end oneself’s existence
Twilight losing her friends is very bad and she will never experience exactly the same friendship ever, even with new ponies, the mane 6 is/was special…