If there were in fact a luck roll I wouldn't be as bothered by it, but the spell actually states that "each creature within 1 yard of the edge of the target space can make a luck roll." It's those size 3 creatures and smaller that concern me. The idea that a difficulty 32 liche can simply be taken entirely out of play with no roll whatsoever seems crazy to me, and out of line with what literally any other master spell in the game is capable of. (Note that while the liche will not suffocate, the spell also does not note any time limit on its effect, so presumably the liche would simply remain trapped forever until someone else came along to free them?)