A Tangle of Links/Understanding Dimensions

Dimensions — they are planes of existence with their own Laws of Reality existing parallel to each other in the Multidimensional Sphere, created, protected and regulated by the Deities themselves

Interdimensional Links
Created by the Fate-type Deities, Interdimensional Links link dimensions together to tether them so they won't collapse and enables the residents of the dimensions to Dimension Hop, should they ever stumble upon an activated Link. They manifest as everyday objects in each dimension, adapting their appearances to each dimension's Laws of Reality. They can be as small as a pebble or as big as a monolithic structure and can only be activated by their creators. They may only be used once and will lose their capabilities once activated, after which a new Link will replace the old one by discretion of a Fate Deity. While dimensions are commonly linked to another dimension, there are dimensions with mutual Links but these are rare and are known as Bonded Dimensions.

Because of the one-time-use limitation of a Link, it's often impossible for a Dimension Hopper to go back to their original dimension unless they are able to contact a Fate Deity.

Magic in Dimensions
When it comes to magic, dimensions have two types: Magic-Rich and Magic-Null. Magic-Rich dimensions are dimensions where Magic particles are naturally occurring and inhabitants have Magic Particle Systems while Magic-Null dimensions are the opposite. Deities in both dimension types are recognised, albeit with different names and appearances, but it's only within Magic-Rich dimensions where deities are known to be real and not just simple myths, like in Magic-Null dimensions. Magic-Null dimensions are also known to be technologically advanced as opposed to the more 'in tune with nature' Magic-Rich dimensions.

Laws of Reality
Created by the Reality-type Deities, the Laws of Reality are the foundations of how the dimensions work. They are relatively the same across dimensions with variable differences that would be used to categorise the dimensions into different categories, like the Magic-Null type and Magic-Rich type. Even with the existence of magic, the Laws of Reality will never be broken by any being other than the Reality-type Deities themselves as they have absolute control over the Laws they made. Not even the other deities can break a Law of Reality.

Any and every Law with differing variables of a certain dimension will not apply to an entity from another dimension (eg. Joshua will not be affected by the Magic of the Love&Letter universe, even if the Magical particles happened to stick to him. It’ll simply look like as if he’s been doused by a large amount of glitter and gloss)