I was wearing the Solar Flare armor.
Terraria Community Forums
UltiDaniel
Wait, so you already beat him?
P H A N T A S M
I meant the beetle armor. 
I got the solar flare armor on a different world with a different character.
I got the solar flare armor on a different world with a different character.
UltiDaniel
Ah.
Well, what tactic are you using in regards to fighting him?
Well, what tactic are you using in regards to fighting him?
P H A N T A S M
I was flying around in the Cosmic Car Key, using the solar eruption, Stardust Dragon Staff, and the Nebula eruption. I was also using the Nurse method cause I'm well.... BAD.
UltiDaniel
Well, how much of the Moonlord's attacks have you understood?
P H A N T A S M
All of them, I just need to understand my inventory layout, I have my rod of discord first, then weapons, then my magic mirror.
UltiDaniel
Oh cool!
So what keeps you from beating him?
So what keeps you from beating him?
P H A N T A S M
I'm not timing the rod of discord or the Magic Mirror take to long.
Better luck next time!
By the way, what were you wearing during the fight?