Skins can exist for both Primary Ability and Secondary Ability. However, No skin will include an outfit on the player them self.
To obtain a skin, head to a skin shop and roll for one.
Inside the skin shop, you can see 4 banners.
The first 3 will be randomly chosen skins that are always in either Epic, Legendary, or Mythical tier.
If a banner is active, the chance of you getting the skin is doubled.
Mythical tier skin 1% > 2%
Legendary tier skin 5% > 10%
Epic tier skin 10% > 20%
Note that only the skin that is on the banner will have the percentage doubled and not the entire tier.
The 4th banner is a "Random skin" banner where you pull 1 random skin from every existing obtainable skin in game.
Mythical tier skin 1%
Legendary tier skin 5%
Epic tier skin 10%
Rare tier skin 25%
Uncommon tier skin 50%
Common tier skin 100%
To equip a skin, go to Menu > Skins > select the skin you want to equip, equip skin.
Most skins can only be equipped on 1 or 2 abilities so remember to read the "Equipable abilities" in its description.