Lissandra Skin concepts!
The first one could be arclight with some tweaking. Infernal could be the the second. The third (maybe elder would) is my favorite and maybe her ult has a tree grow around the target. Her W would be a bunch of roots rapidly grow out. And her E could be a claw of branches. The 4th could be Pre-Battle of the Watchers Lissandra.
(Not my art).