Katarina vs Vladimir Counter Pick

With 2,179 games logged on patch 16.13.1, this is one of the better-evidenced mid-lane pairings in the game, and the result is stable rather than noisy: Katarina wins 45.1% of them. The mechanism is not damage. It is untargetability.

Sanguine Pool removes Vladimir from the game for two seconds while slowing everyone standing on him and siphoning their life. Death Lotus is a channel that hits the three nearest enemy champions, so a pool timed to the first tick strips the ultimate of its target and leaves Katarina standing still. Shunpo can chase afterwards, but Voracity only refunds cooldowns when a damaged enemy actually dies, and Crimson Pact is built to prevent that: every 30 points of bonus health grants 1 ability power, and each point of ability power grants 1.6 bonus health, so one purchase funds both bars.

The stat sheet flatters Katarina and misleads. She opens with 32 armor and 32 magic resist to his 24 and 30, and ends with 111.9 armour against his 100.5, yet both champions deal magic damage, so that armour advantage is largely idle while his health and power keep compounding toward 2,470. Transfusion also lets him harass from 450 range without spending mana, since Crimson Rush replaces it. Both champions are rated demanding, 8 for Katarina and 7 for Vladimir, so the gap between them is structural rather than a question of skill floor.