For each universe, there are many, invisible threads to hold it all together. When the threads are broken, the universe begins to collapse in on itself. To save ourselves, we must find a way to bring the rips to an end and heal the broken dimensions.
This is the Dimensional Rip.
Plot
Long ago, there were creatures called Dimensional Keepers which kept the many different universes or "dimensions" in balance. They would move about in the different worlds and act as protectors for the one they lived in. However, after an unknown disaster cut the species down to only two, they wiped their existence from the memories of all creatures and went to live in the void between the dimensions, watching and keeping balance of all the dimension on their own.
When a young man accidentally found himself between dimensions, he met the two keepers. He befriended them, and for many years, stayed with them. However, one day he betrayed them, killing one and stealing the it's soul in an attempt to gain it's power. The other keeper intervened in an attempt to save it's mate, stopping the man from stealing the entirety of the soul. However, with only half a soul, the keeper was unable to continue living. The man fled from the void, leaving the last remaining keeper to mourn it's loss.
For years, things seemed peaceful, but eventually the keeper overcame it's sadness, instead becoming enraged. It began tearing the dimensions apart, and in doing so, destroying the very things it had protected. The creature once known as a Dimensional Keeper had turned it's back to it's duties and became what is now known as a Dimensional Ripper.