From Rise: The Vieneo Province

Intelligence (Int) determines how well your character learns and reasons. This ability is important for wizards because it affects how many spells they can cast, how hard their spells are to resist, and how powerful their spells can be. It’s also important for any character who wants to have a wide assortment of skills.

You apply your character’s Intelligence modifier to:

The number of languages your character knows at the start of the game. The number of skill points gained each level. (But your character always gets at least 1 skill point per level.) Appraise, Craft, Decipher Script, Disable Device, Forgery, Knowledge, and Search checks. These are the skills that have Intelligence as their key ability.