From Vainglory at EsportsWikis
|Passive:||Dealing crystal damage to enemy heroes will also slow for 1.5 seconds; target can't be affected by Frostburn again for 2 seconds thereafter. Slows by 10% + 1% per 10 crystal power. Max 35% slow.|
is a tier 3 ability
Frostburn provides abilities with amplified crystal damage and slows target upon impact.