Opens all doors on level; 1 use, dangerous. No message.
Opens all doors on level on first use, closes all doors on second use, monsters caught in closing doors are gibbed instantly; 2 uses, beneficial. No message.
Creates up to 5 closed doors in legal spaces (space is orthogonally adjacent to exactly two walls on opposite sides, not orthogonally adjacent to another door, and does not contain a monster or non-corpse item); 1-3 uses, beneficial. Message: "You hear gears grind briefly, then stop."
Generates a 3x3 square of monsters at a random location out of LoS; 1-3 uses, neutral. Message: "You suddenly hear anguished moans in the distance..."
Restores 20 hp, up to 200%, and restores status to 'cautious'; 1 use, beneficial, only appears in Hell. Message: "A harsh red light surrounds you. You feel reinvigorated!"
Destroys a section of wall in a random part of the level; 1 use, neutral. Message: "You hear the sound of crumbling bricks." Plays the gibbing sound centered on the effect.
Also, any lever that creates objects in the room should have the message, "A secret is revealed!"