Graphic Design Art Banners for Video Game

I need four medieval style banners for a video game. The deliverables should be 512x1024 in size, but the banner design is also displayed in the game in a square in another spot so there should be a clean looking 512x512 version that can fit in a square (can be a sample of the fabric of the banner).

The four style themes are

Forest Elves - nature, tree, regeneration

Forest Elf Rebels - same but a little more darker / violent

Undead / Cultists - raising the dead, rituals, darkness

Bats / Dwarves - Underground, bloodthirsty, savages

I attached some banners from age of empires 4, this would be the quality and uniqueness expected from each banner.