Hoarder

Ever wanted to play a character who just has too much stuff? This is an attempt to implement balancing and gameplay mechanics similar to the bard's College of Creation in order to live out the fantasy of playing a greedy bastard who has all the solutions in their backpack but refuses to use most of them. 

Level 3: Deep Pockets

At 3rd level, you always seem to have just the thing. As a bonus action or simultaneously as part of your Cunning Action, you can create one piece of adventuring gear or nonmagical item of your choice in an unoccupied space within 5 feet of you. You produce this item from a bag, pocket, or other container that it was obviously stored in all along. The item must be Medium or smaller, cannot have a gp value more than 20 times your rogue level, and you are reluctant to use it; you must return it to your hoard after a number of hours equal to your proficiency bonus. You can have only one item created by this feature at a time; if you use this action and already have one, you immediately stow away the first item in a bout of uncontrollable greed.

Level 3: Eye For Wealth

Also at 3rd level, your penchant for counting your money has paid off. You can discern the gp value of any object or the gp net worth of any person instantly on sight.

Level 9: Artifact Hoarding

At 9th level, you are finally willing to use the enchanted items in your hoard. You can create common magic items with Deep Pockets. 

You are also adept at getting the most out of your precious tools: If an enemy takes damage from or fails a saving throw against any item that you were the last creature to use, they take 2d8 additional force damage. Replace any save DC in the description of such items with a DC equal to 8 + your Dexterity or Strength modifier + your proficiency bonus. This can include adventuring gear, magic items, and even weapons. The extra damage can occur only once per turn. Caltrops upon ye!

Level 13: Rarer Artifacts

Starting at 13th level, you can create uncommon magic items with Deep Pockets. Additionally, the force damage provided by Artifact Hoarding increases to 3d8. 

Level 17: Your Greatest Victory

At 17th level you have completely overcome your greed. When using Deep Pockets you are no longer limited by gp value, the items no longer have a limited duration, and you can have up to three items created by the feature at the same time. The force damage provided by Artifact Hoarding also increases again to 4d8.