Scattering Trap

Conjuration (Teleportation)
Level: Sorcerer 3, Wizard 3,
Components: V, S, M,
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Area: One 5-ft. square/2 levels
Duration: 1 round/level
Saving Throw: Reflex negates
Spell Resistance: Yes
Material Component: A pinch of dandelion seeds.
Source: Player's Handbook II

Areas you designate on the floor flare dimly.

This spell imbues a number of 5-foot squares you designate with a teleportation trap.
A creatures moving through one of these squares and failing its saving throw is teleported 1d6 squares in a random direction (use the Missing with a Thrown Weapon diagram, PH 158). If reaching the destination involves teleporting the subject into a solid space such as within a wall, the subject is forcibly shunted into the nearest open space and takes 1d6 points of damage. When you cast this spell, the 5-foot squares you designate do not have to be adjacent but must all be within 30 feet of one another.