Encyclopedia Magica: Fishing Anchor

 

Fishing Anchor

Wondrous Item, Rare

Aura: Moderate Enchantment and Transmutation

This anchor is attached to a short cable. When affixed to a seafaring vessel and cast overboard, the cable magically lengthens until the anchor reaches the seafloor, and shrinks when retracted. The maximum length the cable can reach is 1 mile.

Lure Sea Monster. When cast overboard, you can speak a command word. If you do, the cable lengthens to 100 feet below the vessel. Once in position, it begins to emit a magical pulse up to a range of 1 mile, which attracts any nearby aquatic Beasts with an Intelligence of 3 or less that are at least as large as the vessel the anchor is attached to. Once one of these Beasts is close enough, it swallows the anchor. For the next hour, the Beast is enchanted, and anyone touching the anchor can direct the Beast to tow the vessel in any direction they choose. At the end of the duration, the Beast spits out the anchor and is no longer enchanted. Once you have used this property, it can’t be used again until the next dawn.

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One more magic item converted from the 2e Encyclopedia Magica into 5e. Another in the line of magical anchors (and I still don't know why that has enough entries to get its own category), this one is great if you want a leviathan to tow you somewhere and your need for haste outweighs your survival instincts.