Arcane Lock (Archmagic)

You touch a closed door, window, gate, chest, or other entryway, and it becomes locked for the duration. You and the creatures you designate when you cast this spell can open the object normally. You can also set a password that, when spoken within 5 feet of the object, suppresses this spell for 1 minute. Otherwise, it is impassable until it is broken or the spell is dispelled or suppressed.

While affected by this spell, the object is more difficult to break or force open; the DC to break it or pick any locks on it increases by 10.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, increase the DC to force open the object or pick any locks on the object by an additional 2 for each slot level above 2nd. Only casting a Knock spell equal or greater than the level of the Arcane Lock suppresses it for 10 minutes.