Cracked a power scroll today with 6 dice and rolled a 1, 2, 3, 4, 5 and 6 together - no double. I'm still dumbfounded that I could have made this roll under pressure, allowing my opponent to dispel that critical play.

Can someone please calculate the % odds of that happening, and show your working? Surely it is very, very low - if it isn't, maybe i'll re-think my gameplay a little.