You can use limited wish to cast spells from a barred school, however the allowed level is one lower. So Limited Wish gets you 5th level and below arcane from a barred school.
Okay, so Russell, Malchia, Nefario, and Enzo appear next to Luigi. Russell carries the picture out to the middle of a field and casts Disjunction on it?
I will give everyone a chance to chime in on this plan, although Cloud and Montaron are back at the tower.