Tumble resets Vayne's attack timer on cast. However, due to the cast time of the ability, this can potentially result in an actual decrease in DPS if Vayne has sufficient attack speed.
Tumble's cooldown will not start until after the autoattack modifier is used or expires after 6 seconds.
Tumble cannot move Vayne over impassible terrain, but it does allow her to pass through minions and monsters.
Temporary terrain such as Crystallize and Cataclysm can be moved over if Tumble can completely pass over it.
Tumble can be used to dodge Ashe'sEnchanted Crystal Arrow. Not only can she avoid it by diving to the side, but also by diving towards it. This most often results in Vayne being slowed, not stunned, and only taking the arrow's AoE damage. If timed perfectly, the Enchanted Crystal Arrow will completely pass through Vayne.
Passive: Consecutive attacks and abilities mark Vayne's target with silver rings. The rings are removed if Vayne attacks a different target or doesn't attack for 3 seconds.
The third consecutive attack or spell against the same target will consume the rings, dealing true damage equal to a flat amount plus a percentage of the target's maximum health (capped at 200 against monsters).
The direction of Condemns knockback is calculated at the point the projectile hits the enemy champion. Condemn's knockback will follow the line Vayne and her target draw at this specific moment.
Using Condemn on champions that apply suppression such as Warwick or Malzahar is inconsistent. It has been seen on occasion to completely interrupt the suppression, however there have been instances where the enemy is simply moved but the suppression continues, even if he was moved out of the ability's range (e.g. Warwick using Infinite Duress outside of melee range).
Unlike most abilities, Condemn uses a similar mechanic to basic attacks when conducting range calculations - it takes into account the hitboxes of the target unit. For most champions this means an additional range of about 100 units (more pronounced for larger units) and ensures that Vayne can always Condemn if she is capable of basic attacking a target.