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I don't know if it's one individual artist or a team of artists, but I know that the artwork is mindblowingly gorgeous so props to them.
Also, the aphelios one makes me feel certain... feelings. So. Probably gonna be a day one buy.
Happy to see you enjoy them, I'll be sure to pass your praises on! The card backs are done by the team at Kudos, who you see credited on much of the spell card art as well.
It probably going to make me put another 20 bucks in the game, buy the miss fortune card back and have that gold ready for the next battle pass. When is that by the way?
"The power of the [next event] lives in Shurima"
March
https://playruneterra.com/en-us/news/game-updates/whats-ahead-for-2021/