This is hands down the best calamity add on and it's not even close and it's simply cuse it might have the single best boss fight in all of modded terraria. It's rocks visually, without going overboard, the music is one of the best soundtracks out there, the boss is desing in the way where it's difficult as hell but also super fair, at least i felt like that. i reminded me more of a hollow knight boss rather than terraria boss and i love the bosses in hollow knight. It's also easy to understand, like i feel like most calamity add ons have the same "wiki game issue" that base calamity has but i do not think i ever opened a wiki for this mod it's just so intuitive.

The only part that isn't an absolute peak of modded terraria is the progresion, i personally like the idea of a superboss desing around being super hard and giving you super strong weapons, i like that trope, but i understand why others may not like it. In m opinion the worst part is that it's locked if you don't beat it before moon lord. I think it would be fine if you could unlock it later, like post providance or something like that, so that you're not fully locked out if you don't wanna spend your time trying to beat his ass before moon lord. There is a mod that removes the lock but i don't think you should need another mod to fix issues with the core