Gundar got carried away with his storytelling, telling Leone how he personally killed the previous Chieftain of the Darkmane Tribe after the latter did something the old man couldn't forgive.
It was then that the high-ranking tribes realized the extent of Gundar's strength. He was also the very reason why they reinforced the law that no chieftains must be harmed unless they were at war with another tribe.
The moment Varus harmed Leone, the high-ranking tribes, especially the Darkmane Tribe, became anxious, fearing that history might repeat itself.
If there was another precedent of a chieftain getting hurt by some random tribe member from another tribe, this might break the one law that protected them from assassinations!
Using lethal poison and assassination were the two things the Barbarians looked down upon the most. Anyone who used such underhanded methods would be executed without fail.
