Wondrous item, very rare
This supple silken sleeve fits over one of your hands like a glove, rendering your hand invisible and replacing it with the illusory appearance of a hook, which may be shabby, ornate, or have any appearance you wish. The illusion includes visual, auditory, and tactile elements (DC 14 Wisdom saving throw to disbelieve if interacted with). Any actions you take with your hand appear to observers to be taken with your hook, but because your hand is not visible you gain advantage on Dexterity (Sleight of Hand) checks and on related skill checks under other circumstances (for example checks made to steal or to disarm), as long as such checks are made using your invisible hand.
Pirate Campaign Compendium © 2018, Legendary Games; Lead Designer Jason Nelson. Authors: Alex Augunas, Jeff Gomez, Matt Goodall, Jim Groves, Tim Hitchcock, Victoria Jaczko, Jonathan H. Keith, Lyz Liddell, Thomas J. Phillips, Alistair J. Rigg, Alex Riggs, Loren Sieg, Neil Spicer, Todd Stewart, Rachel Ventura, Michael D. Welham, Linda Zayas-Palmer.