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[edit] Can this spell kill you?: YES

• If you fail a skill check, you may create a door that leads to a random player's location--including highly hazardous areas of the Disc (under water, in the middle of the sky, surrounded by hostile NPCs...). ALWAYS "look enter door" before entering a portal.
• Created doors may be burning. Opening, shoving or entering such a door will do damage to you--these doors are usable if you have enough hp and don't mind taking several hundred points of damage.
• Burning doors can be disposed of safely by pushing them over with a wizard's staff or kicking them down: "push door with staff", "kick door"
• Created doors may rumble once opened. Do NOT attempt enter such a door--it will not work and will inflect several hundred hp worth of damage. "shove door" and try again.
• It is possible to create a door that both burns and rumbles when opened. These doors do not work and do even more damage you attempt to use them.