Olvor's armor and magic resistance that are not from items or buffs are increased by 1% per every 1% of health he is missing.
Bonus is calculated from base, passive, runes, and masteries' armor and MR.
Base bonus armor/mr per 1% health missing:
LVL 1: 0.268/0.3125(At <0.5% hp,26,8/31,25)
LVL 18: 0.914/0.525(AT <0.5% hp,91.4/52.5)
Active: Olvor enhances his next attack to be a quick strike.The next Olvor attack's animation will be shortened to 0.1 second and it will cause any autoattack from Olvor's target within a second from quick strike to glance, causing it to deal 25% damage.
Physical Damage: (80 / 90 / 100 / 110 / 120% AD)
Passive: Olvor will regenerate 0.5/0.75/1/1.25/1.5% of his maximum health every second, unless there are no allied units within 750 range of Olvor. This includes champions and their corpses, minions, turrets, and pets.
COOLDOWN: 18/16/14/12/10 seconds
Passive: Olvor takes reduced damage from champion auto-attacks.