Door Rebug

Hold the knob of your target door. If you don't have a free hand or if the door has no knob the spell can't be cast. Upon saying the magical words, the door will sprout insect legs and eyes off it's body. If the door is in a doorway it will crawl out 5ft on one side. The door is now a Bug Door, a homebrew creature until it's dispelled. If the door is made out of a non-wooden material then the creature loses fire vulnerability. Also the creature who casts the spell must make a DC 15 constitution saving throw or take 4 (2d4) neurotic damage and also can't cast the spell again for 4 (1d8) turns.