You sidestep an attack as nimbly as your companion might.

Encounter   ✦     Beast, Martial
Immediate Interrupt      Personal

Trigger: You are hit by an attack that targets AC or Reflex

Prerequisite: You must have a cat beast companion

Effect: You gain a +4 bonus to AC and Reflex until the end of your next turn. If the triggering attack misses you because of this bonus, you can shift a number of squares equal to your Wisdom modifier (minimum 1).

Published in Dragon Magazine 392.