There are many varieties in the existences that are called with Magic Beast summoning.
The monsters sitting around over there, ones living in another world, even up to legendary creatures.
Of course, it doesn't stop at just living things.
As a matter of fact, the PET Bottle we summoned the other day was classified as Magic Beast summoning.
You can summon things as well.
If I were to master this, I'll summon the panties Roxy is wearing! This might be possible to do.