Some door based non-combat encounters:
Trap: Exploding Door- A door whose interior is under tension, like a coiled spring, if the structural integrity of the door is compromised by someone trying to break it down it bursts and sprays the immediate area with shrapnel. It does have the drawback that due to the internal tension it will fail in this way after recieving less damage than it would take to hack through an ordinary door of its general type
Exploding door trap- Magical variant This versi9n of the above trap is held together by magic emitted by the door frame. The key also emits similar magic. If contact with the frame is broken by the door being opened without the magic key (suck as being forced, or having the lock opened by picking or the Knock spell) the door explodes as above
Corrugated door- This door is made of a very very long sheet of metal that has been folded back on itself many many times. The bolt of the lock passes through every layer of folds. Because of its unusually high surface area it requires a higher caster level knock spell to bypass its lock than would be normal for a door of its size
Trap: Exploding Door- A door whose interior is under tension, like a coiled spring, if the structural integrity of the door is compromised by someone trying to break it down it bursts and sprays the immediate area with shrapnel. It does have the drawback that due to the internal tension it will fail in this way after recieving less damage than it would take to hack through an ordinary door of its general type
Exploding door trap- Magical variant This versi9n of the above trap is held together by magic emitted by the door frame. The key also emits similar magic. If contact with the frame is broken by the door being opened without the magic key (suck as being forced, or having the lock opened by picking or the Knock spell) the door explodes as above
Corrugated door- This door is made of a very very long sheet of metal that has been folded back on itself many many times. The bolt of the lock passes through every layer of folds. Because of its unusually high surface area it requires a higher caster level knock spell to bypass its lock than would be normal for a door of its size