Sejuani Ability (LoL): Frost Armor

Damaging an enemy with an ability or basic attack grants Sejuani 10 / 15 / 20 / 25 bonus armor and reduces movement-slowing effects on Sejuani by 10 / 15 / 20 / 25 % for 2 seconds. Both amounts increase at level 7, and every 5 levels from there on. Subsequent damage will increase the duration by 2 seconds up to a cap of ~8 seconds, where after damage will refresh the duration.