It's fundamental to their make-up and the hatred trolls have for Chaos. Almost any troll would regard it as a religious necessity to get rid of _any_ broo, even to the extent of allying with any other (non-Chaotic) race to face an army of broo.Mage said:As for Broo and trolls needing a reason tifight, there is always someone anal in the player group who likes to know EVERYTHING...
Such a troll-broo conflict would also have a large contingent of Zorak Zoran berserkers (with controlled zombies and skeletons, perhaps), probably guest contingents of Storm Bull and (possibly) Rune Lords/Priests of the Lightbringer cults.