Vayne Ability (LoL): Final Hour

Vayne gains 25 / 40 / 55 attack damage for 8 / 10 / 12 seconds, extended by 4} seconds whenever a champion damaged by Vayne dies within 3 seconds. Additionally, during the duration, Night Hunter instead grants 90 movement speed. The cooldown of Tumble is reduced by 30 / 40 / 50%, and grants invisibility for 1 second.