Damaging an enemy with an ability or basic attack grants Sejuani10 / 15 / 20 / 25 bonus armor and 10 / 15 / 20 / 25% slow resistance for 2 seconds, increased by an additional 2 seconds per instance of damage up to a maximum of 8 seconds, with further damage refreshing the duration.
Slow resistance stacks multiplicatively from all other sources. Sejuani may achieve a maximum of 64.14% slow resistance with the Swiftness mastery at rank 2, Elixir of Iron, and Boots of Swiftness at level 17.
COST: 80 / 85 / 90 / 95 / 100 mana
COOLDOWN: 15 / 14 / 13 / 12 / 11
Active:Sejuani charges forward, knocking up all enemies she charges through and dealing them magic damage.
Arctic Assault does not have an area of affect while colliding with an enemy champion; however, if multiple champions are hit by the charge itself, you may deal damage to multiple enemies.
Flail of the Northern Winds
COST: 40 / 35 / 30 / 25 / 20 Mana
COOLDOWN: 11 / 10 / 9 / 8 / 7
First Cast: Sejuani's next basic attack deals bonus magic damage to the target and nearby enemies, capped at 300 against minions and monsters. She then swings her flail, dealing magic damage each second to enemies within range for 4 seconds.
Bonus Magic Damage:4 / 4.5 / 5 / 5.5 / 6% (+ 3% per 100 AP) of target's maximum health
The Frost debuff itself is not a form of CC and hence cannot be cleansed by items or abilities that remove CC. Permafrost, however, is CC and can be removed.
Frost cannot be applied to any target affected by Permafrost until 3 seconds after the Permafrost debuff expires. Due to this, Permafrost is the only one of Sejuani's abilities that do not apply Frost.
COST: 100 Mana
COOLDOWN: 130 / 115 / 100
Active:Sejuani throws a frost-forged bola in a line. If the bola hits an enemy champion, it shatters, stunning the target and nearby enemies for a short duration. If the bola reaches its maximum range, it shatters and slows enemies by 30% instead for the same duration. All enemies in the shatter area take magic damage.