Caesar has the ability to plunder abilities and amplify them! Each ability he steals is stored on his scarf, if I remember correctly, he already has plenty of stolen abilities from a "certain group" represented by prime numbers. The amplification part is essentially allowing him to combine stolen abilities into new ones.

Description: Caesar 4th Year Student at Runes Vocational College One of the Five Top Students of Runes Vocational College: Mariposa Caesar Mojave Angel Noir