Any character can just spend one turn to get through it, which makes it utterly worthless for a 5th level slot.
This is getting really tiring. Either this is the devs' hate for control spells manifesting again, or they don't bother to read 5e or care enough for a spell like this to be actually useful.
Another cool tabletop perk is that it becomes permanent after full duration. You could make defensive walls or create a bottleneck against an invasion. Something a Tactician would do in a CRPG against unfair odds. This is the kind of tactics I would want rather than having to fight against enemies with extra Bombs in their pockets you don't know are there, or a flat +2 to enemy attack rolls.
