Remake of the Chaos Orcs

Ok guys, this thread suffered a heavy improvement ... perhaps this way I can get people to give me ideas.
I need an ability for the building aura (Bloody Aura)... I was thinking on this: Gives units a chance to deal an attack with splash
damage depending on their hp BUT ... I think that is a crappy
modification of Chaotic Rage ... Any suggestions?

Off-topic:
Soon ... Devils Speed will be unleashed and true power will come !! MUAHAHAHHA
For those you check the Devils Speed ability in the techtree ... I can
say version 2.c will have it. Kodo updates will also enter the stack
and I may add the flying unit (but without abilities).

I found a few icons that could possibly used for your Bloody Aura ability.

Chaos Chosen
Blood Pool
Blood
Blood Signet
Blood Boil
Warrior Blood Frenzy
Bloodlust

MMmmm I don't know if you played the ROC Undead campaign, but in one of their missions they have to kill 3 mages and steal a powerful book. The citie where the mages are is protected by a energy field. I managed my hands in a red version of that field. This field will be used in Chaos Orc bases and will grant certain bonuses to units (I need ideas for bonuses). The aura will come from nearby buildings.
Your icons are more like hero ability icons ... and I already use BloodLust Icon for Chaotic Rage (you also suggested it).
I am looking for something else, sorry =S