Ranger unique items quick reference (Nightfall)

Emeju's Longbow
Bow
 * Piercing Dmg: 12-21 (req. 6 Marksmanship)
 * Damage +10 (while health is above 50%)
 * Armor penetration +20% (Chance: 20%)
 * Health +20

I assume this is a 10>50 noob bow, but I'll leave it here, I guess. Please God, let it be a typo...