The whole point of a Lord of Change is that he has plans...plans that crap over your plans...Plans that cause your puny psyker to walk into the room with his 30+ initiative only to use it to see a small rat scurry past and knaw on a trip wire...that causes a series of dominos to fall down...that cause a ball to roll..that defies gravity and rolls along the gutters in the cieling...which knocks over an exact replica of the psyker made of wood, which falls and pokes him in the eye. Giving the lord of change just enough time to trick the ships in orbit to fire on his position....yes....all according to plan...