Okay so I’m finally going to going into a little bit about Andy and his past as an angel pony.  
He’s a fallen angel, he was banished from the angelands after rebelling against the higher order, he was cursed with immortality as a simple unicorn on earth. He used to be extremely powerful, he was an angel of death, he put the undead to rest, he can still do that, it just takes a lot of energy and magic. He tried once he got onto earth was in a coma for a few weeks, which is how he met is boyfriend Ronnie.