Through a mixture of caution and luck, the PCs avoided a number of rooms (and a vital clue...) but they did obtain the sword - which I replaced with a trident of fish command. The cleric claimed that one, although they can't use it in battle.
How come they can't use it in battle?
Consider me entertained.
(No really, with the 5E hivemind so strong these days it's refreshing to be reminded magic items in droves are such an intrinsic and fun part of D&D)

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.