I've been everywhere as far as I can tell, but I am missing a sol shard and another item. Any help finding these would be appreciated.

I find the Strange Totem in the Prison Cell and think it's the key to "Recover Forbidden Knowledge" but it's not. Did I miss anything else?

Is there any information on the length of the game? I would like to buy it. But would hate to spend the money for a 4-5 hour experience.

What the actual ♥♥♥♥ is this boss can someone please tell me how to fight this guy my god especially his second phase the dude hits everywhere literally anywhere I’ve tried to dodge I’m still getting hit constantly into him getting hit to his left right dodging away it ♥♥♥♥♥♥♥ doesn’t matter he still catches me and I don’t have any ♥♥♥♥♥♥♥ stamina either after the a millionth swing from dodging so I can barely hit him is there like something I’m supposed to do to weaken him cause the second phase...

I recovered the forbidden knowledge, but the ending looked the exact same? Is it bugged? Is there just some small detail I missed? Or are there more requirements for the alternate ending?