Loe was released December 2015. expansions from 2016-2017 will be playable in standard
Lightbomb shouldn't be in this deck. It's a proactive priest that plays the tempo game, lightbomb is only good if you intent to fall behind.
Because there are only so many iterations available. It's fine that some cards become obsolete. It's fine. I promise!
Why waste the name and the art when you could buff magma rager and make this card completely unique.