FoxWander
Adventurer
I'd say how tough this room is depends on how many characters go in. The text says an animated set will attack the one who crossed the threshold to animate it- so each character will have his/her own set to deal with. Also each piece has to be destroyed individually, starting with the shield.
If the whole party enters the room this could be a tough encounter. All sets would animate at once and the people entering latest (usually the casters) will get the toughest ones.
On the other hand, if only a scout goes in he'll get one set to fight. Someone will probably go in to help and they'll get a set as well. Presumably the party would stop rushing in at this point. If they're smart, the ones in combat will simply back out of the room so the whole party can help without animating any more. The party can fight them one set at a time in this way which should be fairly easy at this level. Then they can be completely disappointed when they explore the room on the far side.
If the whole party enters the room this could be a tough encounter. All sets would animate at once and the people entering latest (usually the casters) will get the toughest ones.
On the other hand, if only a scout goes in he'll get one set to fight. Someone will probably go in to help and they'll get a set as well. Presumably the party would stop rushing in at this point. If they're smart, the ones in combat will simply back out of the room so the whole party can help without animating any more. The party can fight them one set at a time in this way which should be fairly easy at this level. Then they can be completely disappointed when they explore the room on the far side.