Bag Of Extra-dimensional Manipulation

This bag has an interior space considerably larger than its outside dimensions, roughly 10 feet in diameter at the mouth and 20 feet deep. The bag can hold up to 50000 pounds, not exceeding a volume of 500 cubic feet. The bag weighs 15 pounds, regardless of its contents. Retrieving an item from the bag requires an action. Inside of the bag the walls, floor and ceiling appear to be made of a half metal half rock material and cannot be altered, altered or destroyed in any way. If the bag is destroyed it is recreated empty in its original dimension. There are only 23 Bag's of Extra-Dimensional Manipulation in existence, one bag per world/plane.

The bag has a AC of 10 and 20 HP resistance to all damage and is immune to poison and psychic damage, the bag can be repaired using the mending cantrip or similar magic . if its HP goes to 0 it ruptures and is destroyed, and its contents are scattered in the Astral Plane. If the bag is turned inside out, 10 feet by 10 feet of its contents spill forth, unharmed of the creature's choice, but the bag must be put right before it can be used again. 

Placing a Bag of Extra-Dimensional Manipulation inside an extra-dimensional space created by a handy haversack, portable hole, or similar item instantly destroys both items and opens a gate to the Astral Plane. The gate originates where the one item was placed inside the other. Any creature within 10 feet of the gate is sucked through it to a random location on the Astral Plane. The gate then closes. The gate is one-way only and can't be reopened.

While a creature is attuned to the bag it can change and alter the interior of the bag using an action and/or bonus action. The creature can change one of 5 things. The creature can also choose in what area the effect takes place. (EX: Zero gravity in a 10 foot by 10 foot sphere.) The creature can choose to have this effect affect the entire space or a 50 foot by 50 foot cube or less, but limited to a 6 inch by 6 inch space. The Structure feature works separately from these rules and its features are detailed below.  

1. Light: The creature attuned to the bag can change the light levels in the bag to vary from blindingly bright to pitch black, See Blinded and Incapacitated conditions. The creature can also change the color of the light.
2. Air: The creature attuned to the bag can change the bag's air to either be breathable or unbreathable. See Suffocating. The creature can also change the smell of the space as well.  
3. Temperature: The creature attuned to the bag can change the temperature of the inside of the bag to vary from extreme heat to extreme cold. See extreme heat and extreme cold.
4. Gravity: The creature attuned to the bag can change the gravity of the interior of the bag. The creature can choose from three different options on gravity. 1. Zero gravity: a creature or object's weight becomes zero and the creature drifts in different directions and speeds depending on their momentum and where it is directed. A creature can move around by pushing or pulling off of different creatures, objects or surfaces or by generating its own momentum. (EX: Holding on to an object and swinging it forward without releasing the object, carrying them forward.) 2. Low gravity: The weight of all creatures and objects in the space is halved. The Jumping height and length for creatures is doubled and fall damage is halved. Jumping and falling takes twice as long. 3. High gravity: The weight of creatures and objects on the space is doubled and the movement speed, jumping height and length are halved, ranged melee weapon attacks in the area have disadvantage and fall damage is doubled. Jumping and falling is twice as fast.
5. Structure: The creature attuned to the bag can create and dissipate walls, floors, ceilings, slopes and shapes inside the bag. While creating material the creature can choose between stone or metal and can choose different types of these two. (EX: for stone you could chose polished granite or for metal you could choose copper.) Material created in the bag will dissipate if it exits the bag. The creature can create or dissipate up to 10 cubic feet of  material or less, but limited to 1/10 of a centimeter of cubic material. The creature can also not create material on or inside a creatures space. The creature while creating the material can choose to spread out the mass it creates. (EX: instead of creating a 2 inch by 2 inch cube the creature can instead make a 4 inch by 1 inch rectangle.) When the creature creates material it can choose to have the material attached to the walls floor or ceiling, anchored on place on the air or have created material created in the air and be subject to gravity

Notes: creature with an intelligence of 16 or higher, otherwise it functions as a regular bag of holding., Creation, Control, Container, evocation, transmutation