What Skin would you like to see get Chromas?

For me it's Beasthunter Sejuani. The theme of the skin allows for a lot of colors on her armor and mount. Whereas the rest of her current skins are more restricted (For example: A green monster for her Beasthunter skin would work without a problem, but a green bear for her Bearcavalary skin would look just out of place). Also Freljord Rammus. I see this great potential to turn his ice crystals on his back into normal crystals (green, red, blue, yellow, pruple,... whatever color you want) with the rest of his body turning into an earthlike brown or a stonelike grey/black.