@EurmalEye also when you really think about a lot of powers do give you the ability to see though illusions, life and or deth manipulation, aura based powers, angal and demon related powers, Psychic powers and a lot of different types of magic such as Voodoo, rune, and obviously other illusionist and a lot more types of magic. Unfortunately the effectiveness of illusions is largely based on how the illusion is made and how that influences the other characters mind and sometimes their body. For example narutos sharingan can create an illusion that is next to impossible to break free of alone and requires another character to help free them from it there are some exceptions to this but it is a very powerful illusion. Something you could do to improve the effectiveness of his powers for example there is perfect illusions that mimic life signs, illusion domain where Level infuses his magic into the area to increase the power and effectiveness of his magic so even if you don't have the ability to create perfect illusions you can create illusions that make his opponents want to believe there real even if they are illusions of their biggest fear you could force their brain/ heart to want to accept the illusion is real so even if they have the power or ability to see though or dispell illusions they would choose to accept they are real so those abilites wouldn't activate again there would be some exceptions like the masked man. Or you could even create an illusion that takes place in thier mind like a mental prison where level and his opponent would essentially fight each other using thier minds in a fictional would that leval could control or at the very least influence. There is also the possibility to use your illusions to hypnotize your opponent then you could either control them or havem them defeat themselves.