the spell icons also indicate their school (standard), so, for example, the "lightning" spell is in the magic of air, and therefore the outer frame has become light blue, and the background on which the lightning is located remains red.
Here, for example, summoning elementals: I reworked the summoning magic into the original magic, and I had to redraw the icons - as you can see, not only the frame has changed, but also the background on which the spell is located.
Added 3 hours 58 minutes ago
guys, I looked at the screenshots of the city and the siege...
there is a glowing wall, like in the battle with Kha-Belekh. what if we cut it into pieces, attach it to the walls, and when the wall is destroyed, part of the strip would disappear?