“Heroes of Might and Magic V: Tribes of the East”

Drowning – it happens often. With a mentor, there should be maps added, similar to those in "Tribes of the East"; compare the list with the original. Ossiru can develop "True Luck," but only with the help of the same mentor. And "Freezing Touch," like "Armageddon," are just spells, like "Magic Arrow" and "Divine Power." Only slightly more powerful :). All spells are learned in magical guilds and on altars (altars – up to level 3), and then, as Ment noted, in utopias, you can get a level 5 spell with a high probability if the corresponding magic has been studied. Also, level 4-5 spells can be found in the treasure chests of mages. In spell libraries, you can buy such spells, but it's very expensive and with a small chance of finding the right spell and the right magic. I hope this is comprehensive :).