I'm not sure if this is a glitch, but in the game itself, the icon for Blizzbrand (I believe) is wrong. Iceburst Brandish (3*) and Glacius (5*) both have the same icon: blue blade/hilt in an orange background while Blizzbrand (4*) is a darkish-grey/green like blade in an orange background (much like the Blazebrand line). I'm not sure if it's a glitch or a mistake, but I don't believe the 4* in the ice-brandish line would be a different icon from the others.