Massive sustained attack speed and shred damage.
Improved attacks and sustained damage
1.5s after damaging a champion gain a large amount of attack speed. Lethal Tempo allows you to temporarily exceed the attack speed limit.
Takedowns restore health and grant bonus gold.
Takedowns on enemies grant permanent Attack Speed.
Deal more damage to champion with more maximum health than you.
Empowered abilities and resource manipulation
While above 70% health, gain up to +40 Ability Power or +28 Attack Damage (based on level), Adaptive.
Gain increasing amounts of AD or AP, Adaptive over the course of the game.
+9% Attack Speed
+6 AD or 10 AP
Lethal Tempo's bonus attack Speed synergizes well will Varus' passive as well as auto-attakc heavy playstyle.+
Taking Triumph lets you fight to the death and hold your group for the kill, coming out the other side with massive health to keep fighting.
If you have a reliable healing support (Soraka/Nami), Overheal can be a great alternative to for getting topped-off and entering small trades with the health advantage.
Varus loves to attack as quickly as possible to build W stacks and BotRK damage. Alacrity double's down on that allowing you to pump out more damage.
Cut Down lets you shred tanks and junglers thanks to the fact that you won't be building any health items.
Absolute Focus gives you a considerable amount of bonus Attack Damage early in a fight so you are able to burst down the front line.
Gathering Storm is your late-game insurance poicy making you a hyper carry capable of shredding any target.