Identifying games in the style of Might and Magic.

You had to bring a rat pie somewhere. One of the first, if not the very first.
Ogre Shelter - you enter it, and the entire team turns into ogres. You need to complete the location within a week and find an antidote to return to your original form.
Something like the Tower. I remember the location having a "boss" - a snake in the basement, which you fall into through a pipe. It's quite difficult to defeat it without casualties.
And there were also some underwater locations - the team suffocates underwater. You need a special helmet and shield to breathe underwater for a long time.

Wizards and Warriors.