Horror Reward System

[NTJedi]

After seeing the stats of these new horrors and witnessing some of them in action it seems some sort of reward should be given to the commander for winning a battle against one of these terrible creatures which come from different planes and/or dimensions.

It seems only logical a commander or unit which has been able to slay one of these terrible beasts in battle would be more experienced and/or receive a bonus or two for one of his random stats such as strength, magic resistance or dexterity.

Currently even if a commander slays any of these super horrors twenty or thrity times the only reward is the same as killing a single infantry on a normal battlefield.

Any ideas on what types of rewards could be given to a commander which slays one of these terrible horrors?