Locked spells on the locks themselves. If not inspected properly (there should always be a way to check) you could get zapped with a spell put there by a chanter.

Would be kindof like locked rune but maybe with more evil spells allowed.

If not disarmed it could have a chance to go off each picking tick.
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If you say plz because it is shorter than please, then I will say no because it is shorter then yes.