Forgecage is a heck of a lot more expensive though. 1,500 gp in ruby dust, ouch!In which case, it is very weak. Why? Because Force Cage does the exact same thing and is a level lower, also no save.
Though you can replicate it via greater shadow evocation (8th lv spell), thereby eschewing the need for a costly material component. And I don't think the 60% real drawback affects any part of the replicated spell meaningfully (how do you have a wall of force that is only 60% effective in blocking?).Forgecage is a heck of a lot more expensive though. 1,500 gp in ruby dust, ouch!
What did Trailblazer do?
No spell of the level (16th) can do what this spell can do without a save. It is ignorantly potent against elite or solo high level BBEG's, which makes it inherently overpowered.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.