Rek’Sai vs Amumu Counter Pick

Tantrum permanently reduces the physical damage Amumu takes, and Rek’Sai’s damage is entirely physical. That one line of ability text does more work than any statistic in the matchup, which she loses at 44.6% across 121 games on patch 16.13.1.

Everything else compounds it. Amumu opens with 685 base health, a large pool for level one, behind 33 base armor. Queen’s Wrath and Furious Bite have to chew through a flat reduction on top of that, and only the maximum-Fury version of Furious Bite bypasses resistances with true damage. In the other direction, Cursed Touch marks Rek’Sai so that incoming magic damage also deals bonus true damage, which makes Despair’s percentage-of-maximum-health burn and Bandage Toss hit considerably harder than their raw numbers imply.

Two advantages remain worth playing for: 175 attack range against 125, and 340 move speed against 335. Burrow’s tunnels also let her leave a fight that has turned, which matters because Curse of the Sad Mummy stuns everything nearby once she is inside it. Both champions are rated 3 for difficulty, so execution will not close the gap; the practical answer is to take camps and objectives on the far side of the map rather than contest the same ground. Her kit reference: Rek’Sai.