This spell causes the steps on a stairway to flatten and form a ramp or slide.
Purpose: A protective spell against intruders (or someone specific).
Supplies: a computer/laptop with a photoshop/paint program; paper and a writing utensil
Notes: Either use the photoshop/paint program or draw this out by hand. Since I'm not artistically gifted, I'm going to describe this with a stick figure. You can get as realistic as you want.
Draw a set of stairs leading to your house/apartment/place of residence. Draw a stick figure on the ground.
-- Specifically write a name if you want to prevent a particular person from coming to your door, or write something more general [intruder(s)].
Next to or below that drawing, draw the stick figure coming up one or two steps. Say, "Glisseo". Draw the stick figure on a curved line or straight incline (slide or ramp), and if you would like, you can draw them sliding down.
Draw the stick figure on the ground, ultimately unable to get to your door.
Optional: Pair this with a sigil that you can trace on the door.
Personally, I would translate "Glisseo" into Gallifreyan and write a message in another language around it, along the lines of:
no matter how hard you try
you're on a one way ride.
((Feel free to write your own message. This is an on the spot rhyme that may not suit your specific needs.))