Paradoxes
Paradoxes are irregularities in time-space which cumulate into a Paradox Event when great amounts of Paradox Mana gathers into a single point.
Nature
While unseen the fabric of reality in each dimension has slight differences which when introduced into another dimension causes a conflict. an analogy commonly used is that of blood in the human body where a paradox is a dimensional infection
Generally paradoxes occur naturally due to dimensions being linked however inter-dimensional civilizations such as Belka and Mid-Childa can cause the occurrence of these to increase.
Aside from a dimensional infection because of the infinite complexity a dimension can itself cause conflicts within itself as such no matter how isolated a civilization can make itself or it's host dimension these natural paradoxes are unpreventable thus something every civilization will deal with.
Paradox Events
Dimensional Quake
Dimensional Quake, sometimes called a Chrono Quake are a type of earthquake which can be felt throughout the Sea of Dimensions. with a normal earthquake a Mage can cast any flight spell to get off the ground to become unaffected however Dimensional Quakes shakes the very fabric of time-space itself, thus taking flight does not avoid it.
Dimensional Quakes are more commonly associated with inter-dimensional travel when brute force Dimensional Transfer is employed