I put this in my campaign. The monk decided to use it exclusively in battles. He rolled a 52 the first time he used it while on a boat battling pirates...then he and the team had to deal with fighting pirates and the inexplicably irate white dragon wyrmling that he fought while the confused pirates kept asking "Is that thing with us? Do we have a dragon and no one told me?"

Ultimately the monk killed the dragon and used an action during the fight to throw its body off of the side of the boat before the 15yr old cleric kid the party (literally) adopted saw it.

I'm kind of kicking past me for automatically deciding that the dragon was hostile. It would have been an interesting pet for the party.

what the heck is a tenday

My players read about this and used it to DESTROY blackrazor

This is an absolutely wonderful item! I love the flavor and fun that this could bring to a campaign.
I think it's great as-is, but here are some minor corrections if you'd like. If not, please feel free to ignore the inherent rudeness of my gesture.

To begin, I think that either all of the listed items/creatures should have periods at the end or none of them should. As some of them are multiple sentences, using proper punctuation for all of the options would probably be the better stylistic choice. Let's get this thing into an official WotC book!

• If another object (or the same one) is placed in the bag a third time within a tenday of the second attempt, the bag devours the object, sending it into a void, disappearing from existence, and the bag cannot again be used again for a tenday.  Any additional attempts to store an object in the bag results in this again, resetting the countdown back to another tenday before its next use.

 9 - A small figurine of the closest cities city's leader appears in your hand.

12 - A dirty sock with a sticky substance in it appears in your hand.

19 - An axe appears in your hand. Upon attunement or use of the Identify spell, it is revealed that this is a Berserker Axe.

26 - A large chunk of horse manuer manure appears in your hand.

29 - A wooden shield appears in your hand.  Upon attunement or use of the Identify spell, it is revealed that this is a Shield of Missile Attraction.

30 - A rusted dagger appears in your hand. It functions as a normal dagger, but cannot be sold.

31 - A small bit of snow appears in your hand, and melts before quickly melting away. quickly

37 - A note appears in your hand.  The text of the note reads, "Please try again."  You may attempt another time to pull out on an item.  If this number is pulled rolled again on the 2nd second try, a Ring of Invisibility appears in your hand.

 39 - 5 potions fall to the ground. These appear to be Potions of Healing. Drinking this these potions or casting Identify reveals that they are, in fact, Potions of Healing.

43 - A dart falls from the bag. On a failed DC13 DEX saving throw, the creature that removed the item takes 1d4 points of piercing damage and is Poisoned for 1 hour.

 44 - A sewing kit appears in your hand. It contains some loose, blue thread and 10 fine needles.

 46 - A 12-sided die with the number 6 worn off appears in your hand.

 49 - A portrait of a Silver longsword with the name "Tranavious" engraved on it [the blade, the hilt, etc.] appears in your hand.

 50 - A note that reads, "This bag is nothing but trouble!!!!" appears in your hand.

 59 - What appear to be 5 Potions of Water Breathing fall to the ground.

 64 - An artistic drawing of a noble human appears in your hand.

69 - A venomous insect stings you and flies away. On a failed DC10 CON saving throw you are paralyzed for 10 minutes and Poisoned for 1 hour, on a success [on a successful save, otherwise] you shrug off the effects and nothing happens.

 79 - You actually grab the bottom of the bag and flip the bag it inside out. Upon doing so, the bag falls to the ground and violently flips back to it's normal form and before it lunges into you, dealing 1d6+3 points of bludgeoning damage.

 91 - A suit of Plate Armor falls to the ground. Upon attunement or use of the Identify spell, it is revealed that this is an Armor of Vulnerability.

 93 - A pristine, blue dragon egg appears in your hand. After 1d20+5 days, the mother comes looking for it.

 98 - 300 counterfeit gold pieces fall to the ground. The items coins are actually pieces of iron covered with gold paint. 

100 - Nothing appears in your hand. The bag falls to the ground with its edges folding into itself, and until the bag disappears from existence.

Quote from Sqeggit >>

My only question is that if an NPC falls out of the bag what do I have them say? Are they from another plane? Were they just minding their own business when they get dragged there? Did they fall asleep and find themselves on the floor in front of the party? Other than that this is easily my favorite homebrew item.

 I guess that’s up to you. Personally I like the idea that the bag was crawling along the ground and went they bent down to pick it up it devoured them and they were sent to some empty (except for the occasional item floating around) plane where basically nothing exists.

Quote from Benz74M >>

Once per day, as an action, someone can reach into the bag and remove something from it (roll 1d100 and use the table below to determine what is removed from the bag).  Anything removed from the bag is permanent to the plane, it will not disappear after a time limit -- it is just like any other item or creature on the plane.  See the Monsters Listing for the creature's statistics.  

 

The way I read this, someone can simply spend (e.g.) 100 actions, i.e. 100 rounds, i.e. 10 minutes to remove possibly permanent items such as bags of holdings, armors of vulnerability, scrolls of fireball, decks of illusion, 500 silver pieces, etc. 

What prevents a second or third tier level party to keep reaching inside the bag and pulling out items? There's no serious downside (barring rolling 100). 

There should be a time limit on these items before they vanish/teleport back to wherever or whatever dimension they were taken from. 

 

 Well, if you roll a 100, then the bag disappears, but I do think it should be more likely for the bag to disappear (E.G. 99-100).

I want to recommend this to my DM. It's amazing.

I - when- you- how- what-, this is BEAUTIFUL THANKS FOR THIS!!!

Amazing item, So many choices, 10/10 goes in my campaign.
But.. as you commented yourself.. the only problem with this item is that its very "in our game", and as a DDB homebrew so it's just too "wordy"
If the item is in the players inventory its just ALOT to read and try to understand. I tested it and it was a little overwhelming. IMO it needs to become more general and sort of template-able for the DM to have an easy time without having to make his own private homebrew based on this one and just make his own tables.

TL;DR: Loved it, Gave ideas, Amazing job ♥

So I've been running a campaign for the past 4 years and I introduced this item in the first 3 sessions. The players got hooked with it immediately, judging how the day goes by depending on how good the pull of the day was.
Since its been a mainstay with the party, here's a few things that have happened.

1. It's discovered that this bag is not creating things out of nothing but instead is pulling an existing item from the world and stealing it.

2. This revelation became relevant the second time the rolled 93, and had the same very angry mother dragon return even angrier after seeing the same idiots with their egg again.
2a. They pulled it a third time and had the shells of an egg instead.

3. One of the first pulls of the game was 19, the berseker axe, and almost led to a player death at level 1.

4. Managed to build an entire lore and kingdom which ended up having plot relevance to the Knight (34).

5. The party now has a collection of fancy blue wizard's hats, as they've pulled that nearly 20 times by now.

6. They make bets every day on category of the item. Imagine the surprise when a whole freaking person came out of the bag.

7. Most recently, they came across a mutated fey whose very presence destroyed living things on touch. The only saving grace was that their fey nature was now cartoonishly in effect- which caused them to savagely delight in games. One of the party members gambled safe passage and the fey to be sent back to its domain if they won a guessing game of what was to come out of the bag. The mutated fey guessed "A single item!", and they cursed their way out when several silver coins were forcefully ejected from the bag.

4 years of near weekly usage and we still haven't pulled everything on this list.

All this to say, that my friends and I have gotten an astronomical amount of mileage out of this thing. Thank you for this wonderful item.

Edit, and i can't believe I forgot this: At one point in time, I destroyed the bag. But after that, sessions just felt like something was just missing. So, a few months later, the bag magically returned as a boon from a very questionable deity.

In D&D, they do not have weeks. Instead, ten days is called a tenday

Am I the only one who is enjoying the stories of parties using this in comments section more than the item itself. That's saying alot as this bag is fantastic. I wish the list could be expanded further but sadly d100 is as high as most things go. 

love this so random