An enemy successfully passes through the area you or your allies guard, but it doesn't end up where it expected; it is gone.

Daily   ✦     Psionic, Psychic
Immediate Reaction      Close burst 10

Trigger: An enemy leaves a square that is adjacent to you or one of your allies

Target: The triggering enemy

Attack: Intelligence, Wisdom, or Charisma + 6 vs. Fortitude
Level 21: +9.

Hit: 3d12 + Intelligence, Wisdom, or Charisma modifier psychic damage.

Miss: Half damage.

Effect: The target is removed from play (save ends). When the target saves against this effect, you can choose to have it return to play in any unoccupied square on the ground within 10 squares of you.

Published in Dragon Magazine 387, page(s) 18.