Anti-Mage Competitive

Silence enemy mages with your E, when they are casting their skills.
At level 13  Virulent Reaction   allows you to root them. Overpowered.
At level 16 with Superstrain   you can survive crowd controls.
At level 20  Top Off  is a great 2nd choice, but I prefer  Bio-Explosion Switch   for the extra silence.

Ultimate choice:
Flailing Swipe   helps to reposition yourself and enemies.
Kick them to your turrets and GG.

DON'T PICK THIS BUILD AGAINST A DIABLO TYRANDE COMPOSITION