Story: Typical Zero to Hero, Save the world, lacking uniqueness for me to remember.
it is average plot about evil sword treasure (i am not too sure why sword can be the main evil here) destroyed the world then sealed by past heroes (naruto-ish).

Although ML start with no-power and cursed with no-ability to horn any divine skill.
In Eps 1 then it is revealed, ML is destined to have stone that could give him over-power-skill-etc and i guess (as i dropped the series) then begin a journey to hone its power. Honestly i don't like this kind of ML get the power from treasure. I don't like Lead who is given power by someone/something.

It is really typical story, nothing special.

Characters: Too fast introduction thus no connection.
Lacking of introductions, especially on main leads. The ML just meh, he is supposed to be smart and fast learner, as he is good at physical skill although he is blind and can't move forward with spiritual skill, similar with Ever Night ML.
From introduction to breakthrough of enable him to learn spiritual skill is too fast (only one episode) therefore i am not attached with his character at all.
Same issue with FL and Main supporting casts.

Actors: Below average actors to play bad characters. Or perhaps the characters will be not bad if the actors do a decent job?
ML: bad, no distinctive personality. Like average joe next door character an become a main lead. Is he smart? I don't know. Righteous? Yes but not showing. Hardworking? Maybe.
FL: average, well she is spoiled brat with talent, break the rule here and there, nosy with other people business.
FL Antagonist: her acting is bad. She is bad an try to look nice, however why everyone immediately know her ambiguous character. She is not smart enough to play someone try to hide her evil side.
ML Antagonist: Bad acting. Not worth to explain

Music:
I don't pay attention too much on music, so i give it 8.