Apparently the ability is for Crusaders, who do decent damage with it so that's fine (if disappointing for berserkers). I don't like the stats though. I think it's better for this weapon to have the AP+Str motif rather than the AP+Agi+Crit+HP mess.
And the size should be increased, it looks pathetic as it is. Or perhaps because it's gripped too close to the blade that it looks so small and unimpressive.