I just beat this late-game boss on my first attempt (spoilers)

I literally beat the Nameless King a few minutes ago and I just couldn't help but share my excitement with you guys!

I've heard from others that this boss really hard and has taken them countless of tries. But I just went into the fight not expecting to come out victorious since the first phase really messed me.

Awesome fight as well, I beat some other bosses on my first attempt but Nameless King was probably the most notable one.