Kha’Zix vs Rammus Counter Pick

Physical damage aimed at a champion whose defining ability multiplies his resistances and reflects damage back is the wrong shape of fight. Defensive Ball Curl vastly increases armor and magic resistance while returning damage to anyone attacking him, and Spiked Shell converts those resistances into bonus attack damage. Kha’Zix deals physical damage exclusively, and he wins 45.8% of 448 games on patch 16.13.1.

• Frenzying Taunt forces the assassin into a reckless assault on Rammus directly, the opposite of what he wants and a direct feed into that reflected damage.
• Powerball closes distance with a slow on impact, and Soaring Slam knocks enemies up when cast out of it, so escaping a failed engage is not guaranteed even at 345 movement speed against 335.
• Rammus deals mixed damage, so 32 base armor and 103.4 at level 18 cover only part of the incoming total.
• Base durability is nearly identical, 645 health and 35 armor against 643 and 32, with level-18 pools of 2,345 and 2,326.

The exploitable detail is that Rammus fights at 125 range with no reliable ranged threat, so Void Spike chips safely and Unseen Threat still applies whenever he separates from his team. Evolving Wings through Void Assault for the extended Leap is the sensible concession.