Isekai where the guy ends up as a prison guard(I think) and can turn into some kinda powerful squid dude.

[Kknewkles]

The funny thing is I was sure it was Reincarnation Coliseum. It was super confusing.
Should've added to bookmarks.

 

[Hicleric]

This? https://mangadex.org/title/644b3c1b-6f82-4f50-a839-51a39cf08b03/gokusotsu-kraken

As a man of culture and refinement I can't admitsay I've given more than just a cursory glance at the, er, material to see if it matches the prompt.

 

[ieatass69]

baldur's gate 3

This? https://mangadex.org/title/644b3c1b-6f82-4f50-a839-51a39cf08b03/gokusotsu-kraken

yea this one

 

[Kknewkles]

This? https://mangadex.org/title/644b3c1b-6f82-4f50-a839-51a39cf08b03/gokusotsu-kraken

As a man of culture and refinement I can't admitsay I've given more than just a cursory glance at the, er, material to see if it matches the prompt.

Yup, thanks- it' in my lists and I didn't see it... oh boy.
Learn to read, kids. It's an irreplaceable skill.