[Crunchy in milk]

Originally Posted by kuze

...unless it has a serious loot-just-one-more-dungeon-Ã*-la-diablo-hook.

Nope. Most weapon types have 3 or 4 (evolutions), in fixed locations on specific levels. They're the highest form of reward for discovering secrets and exploring dungeon levels completely. All of the mechanics relate to one another as part of the challenge (to the player).