Whoa, I never thought I'd make something like this brilliantly.
He's a impossible triangle, so he counts as a optical illusion, I guess. [FORTRESS INFO]: Its grey colour scheme is to confuse intruders that try to raid the base. It would be filled with traps to stop them. This fortress is also levitating as another defense. The final defense here is it made such a way that only Optical Illusion and his team knows the way around.
