Super Evil Megacorp's Vainglory has a new update that includes a brand new Skin system (It's not as horrifying as it sounds).
Skins give you more options for what your hero will look like. There are three tiers of skins, and right now there are six heros that can equip them: Dark Parade Adagio, Prehistoric Glaive, Raver Girl Koshka, Bug Petal, Shogun Ringo, and SAWborg.
The skin system is card-based. As you play you'll earn cards in the Spoils of War. You can purchase tier 1 skins with either in game currency or by turning in the required cards, but other tiers will require you to have cards for the skins. Super Evil Megacorp says their are more skins on their way.
You can download Vainglory for free if you'd like to start collecting skins [Editor's Note: yup, still sounds horrifying].