Corey was a tier 2, an early stage tier 2.
No matter how high Corey's physique was, Corey should not be able to store up to 50 tier 3 nightmares and abominations in his finger.
If storing nightmares and abominations above a person's tier required just a powerful physique, then it would be entirely reasonable for Corey to be able to store up to 50 tier 3 nightmares and abominations.
But the requirements was not wholly dependent on a person's physique, but also his soul.
Especially the soul.
Corey knew nothing about the soul nor did he know anything about his own soul.
He only knew that his soul got upgraded to a cosmic soul.
He didn't know what that meant or how that benefited him.
So, Corey was completely ignorant about his own soul.
Storing a nightmare or an abomination in the finger put more strain on the soul than the body and a demi-paragon with Corey's current stats should only be able to store ten tier 3s in the finger.