Scottish Highlanders were Scots who originated from the highlands of Scotland. They were known as ferocious and incredibly brave warriors, and many highland tribes were very feared by the Picti, Irish, Welsh, Saxons, Angles, etc in ancient England. Their ancient warriors are most know for their rebellion against the Anglo-Saxon kingdoms in medieval Europe. They fought very bravely, and were known for gladly fighting to the death for a cause they believed in. They were naturally tough and strong from growing up in the unforgiving highlands.
Although they typically were a peaceful people, they became notoriously more fearsome and patriotic the more their livelyhoods were threatened.
My idea as far as stats go:
Cost: 4 (maybe 5 if you guys think this is OP)
HP: 20
Move: 3
Attack: 1
Armor: 0/0
SPECIAL For every point of damage they take, they gain +1 attack, So with 1 health left, they would have 20 attack power. I think it should be affected by infantry upgrades and sword mastery, as well as centurion boosts.