As we know kita create a black hole Magic and a vacuum magic and he also know how to get back. Today we know how he created it.
(Kita)
Black hole Magic :
To create black hole kita increase the gravity of the object by gravity magic. Its required high mana to increase the gravity. Its also have a disadvantages like if user cannot able to control it then the black hole consumes whole earth in an hour's. user have to keep distance to operate it, if he close to it then user also get consumed by black hole. To stop the black hole you have to decrease the gravity of the object.
Vacuum magic :
In vacuum magic there use of wind magic which is four natural elements. Wo create vacuum magic we have to select the object area to process it. We have to consentrate the area where we have to create vacuum. We have to remove all air surround the object and make like that outer air wouldn't go inside of the vacuum.
Its also have disadvantages like it consumes maximum mana. It hard to create it in limited area. If we use this magic to human or other living creatures they will die in an minutes, because they won't able breath.
Reverse the summoning
I know how to do this if we reverse the circle and put our mana in circle we can go back to our world but there is a problem we know in the universe there is nothing stop all thing in universe are move. And also universe also move. Let me explain
We know moon rotate around earth and earth rotate around sun and all planets in our solar system they rotate around sun. As we know our solar system also rotate around the black hole which is middle of the our galaxy, similarly all planets rotate around the black hole which is located in middle of the galaxy. As we know all galaxy travel in light speed in the universe. Similarly the universe also rotate in the omniverse.
When we get summoned to this world our universe is close to this universe by that we get summoned directly there. And also this universe where we get summoned this is not belong to our omniverse this universe get closer to there omniverse end and also our universe get closer to our omniverse end by that we get summoned there. If we try to go back by summoning circle we will not get back we will transfer to another world in there omniverse multiverse.
If we have to go back then we have to wait until our universe get closer to our omniverse and this universe get closer there omniverse. This will take time to happen that again.