Arms Scroll {Satori Sign}

These coveted scrolls contain the knowledge of martial prowess. If you spend 10 hours over a period of 4 days or fewer studying the scroll's contents and practicing its guidelines, you gain proficiency in your choice of a simple or martial weapon, or tool. This is a consumable item, and once used, the scroll turns to ash. 

This magic object was re-crafted by the magi of wonder and whimsy; Cameron the Clairvoyant. He loved to create, and was inspired by many things around him - people, places, things, concepts, nature, anime, pop culture - and loved to craft superior unique things for the Dungeons and Dragons community. Check out his homebrew creations in every category on D&DBeyond, and feel free to incorporate them into your homebrew campaigns. Cameron the Clairvoyant is a former player-character that reached level 20 and now functions as a NPC Archwizard, and has created numerous impactful magic items, weapons, subclasses, monsters, creatures, feats and spells. Seek him out in your next quest! He loves to take requests and interact with parties of player-adventurers.

Notes: Proficiency: Choose a Simple Weapon, Martial Weapon, or Tool, Buff, Consumable, Utility Potion