Okay, this is another question related to my drop mechanic, a question similar to Wingjaw Steel: Superior Armor and Weaponry? in that it concerns a monster's effect on items.
You see, when a monster is killed, its magic infuses the item used to kill it. Also, the life force released upon death interacts with ambient magic and objects in or around the monster to create Drops, which range from body parts to coins and adventurer gear (armor, weapons, random knickknacks). This is relevant because a Mage can "craft" parts of a monster into an item and activate its dormant magic to create an enchanted item.
The monster this question concerns is a Snapper, which has four webbed feet (no legs) and a box-like body (think boxfish) that tapers to a wedge-like point in the front, which is split in two by a large, horizontal mouth with prominent fangs. Basically, a Snapper is all jaws and stomach, and their behavior reflects that. Unfortunately, Snappers spawn anywhere with stagnant water large enough to hold them, as well as in wells left alone too long, puddles, and tide pools.
However, Snappers are dang useful for one thing. When they are killed, their magic becomes an Amphibious enchantment on the item used. The Amphibious enchantment prevents the destructive effects of water (or saltwater) on objects, so you can use an Amphibious kleenex underwater. Additionally, Amphibious items have the same drag underwater as they do in air. This makes metal weapons much more viable for marine usage.
EDIT: As stated above, the Amphibious enchantment gives an object the same drag in water as it has in air, but Amphibious items also retain or exhibit buoyancy. In other words, being in water is like being in a wind tunnel for humans; one doesn't usually float in air, but with a strong enough updraft it is possible!
However, I wonder how useful this will actually be, so my question is: How Beneficial Would The Amphibious Enchantment Be On General Items?
Thank you for your input and feedback, I really appreciate it! (In other words, if you see a problem or need more information, let me know so I can add it!) If you decide to VTC or downvote, please give me an explanation so I can improve this question and make better ones in the future.
Final Notice: For those who answered this question, you have my sincere thanks. Since your answers were all equally helpful, I found I couldn't accept just one, and I hope you understand that.