Ah, I read a story like this before.
The book was [Shigu's Summoning Techniques.]
A witch named Shigu summoned an existence she could not control, and was eaten alive.
I have enough magic to probably summon anything, but that doesn't mean I have to follow through.
Indeed, I have no plans to summon anything that scary.
Basically, I already have 3 pets at home.
No point in calling another one.