byakuren has also freeze (but considering the time of posts I guess I'm too late to post T_T)
also, Strike-Back rune and wall rune doesn't work together (Well I tried it on Rahal, With wall rune, strike-back and firefly)
Yeah, Counter attacks and strike-backs are different
and also, you can use strike-back runes to abuse Killer Rune (especially the instant death)
"Hey, listen up! These Godwin traitors got no respect for justice. And sure, sometimes justice is just a little word. But sometimes justice is three feet of sharp steel smashing in your face. Now, let's go get 'em!"