The Royal Hakraxx only answers to the ruling King of the Croc tribe. It's smaller than the Grandiorus but you should never be fooled by looks. The royal red crystal is extremely powerful. The only two ever found in CHIMA are mounted in the Royal Hakraxx and the Grandiorus. If you pointed the light from the crystal at the Eagles' planes, you could really mess up their navigation. It's not considered fair fighting, so Crominus almost never does that.