Akkorokamui's Sucker

If part of Akkorokamui's tentacle is kept, the sucker can be utilised for its sticky properties. It's deep red, and around the size of a grown mans palm, both sides as sticky as the other. It sticks to almost every surface, and can only be peeled off in a certain way. It can be used to connect two items of considerable weight together, or allow a dexterous player to scale walls. After significant use, the stickiness will fail, and the DM may request 'stickiness' checks to confirm success.