There are a number of variarions of this effect. Many begin with a twisting aces type effect then the backs change color (i.e from red to blue) then again to all different backs. I remeber years ago the effect "Cascade" which I believe was created by Roy Walton had this effect. I also believe Howard Schwartzman sold a version. Recent incarnations include "Outback" available through trickshop.com and the effect "Mirror, Mirror" (where the final change is to all mirror backs) avilable through many dealers. Ton Onasaka also had a version at Abbott's Get-Together this year that he was selling.