Days passed after Corey's deadly encounter in the strange space that contained the creatures of the void, and during those days, Corey had done quite a few things.
After the queen mother sent him back to his underworld residence, Corey decided to take a day off. He slept, ate, and he decided to read the book of alchemy which was given to him by the Paragon Ancestor.
The next day, Corey decided to continue his practice on the teleportation spell… though with a bit of apprehension.
Assuming the queen mother did not inform him of his error with his teleportation spell, Corey would definitely not try to use the spell again until he was a million percent sure of his success and safety.
Finding himself in an extremely dangerous and sure death environment just because of a spatial ability… was not worth it.