With two new upcoming skins in League of Legends Patch 13.1, Sivir will be tied for the champion with the second-most skins, just behind Lux.
The Battle Mistress will have 16 skins with the release of Mythmaker Sivir and Prestige Mythmaker Sivir, which are set to release with Patch 13.1 this week. This will shoot her to second place just behind Lux, who is the only champion with 17 skins in the game.