Unofficial Graalian Artist's Challenge - Idea Thread

[Goboom]

So, I was thinking lets help Zen out a bit and name some challenges we would like to see used for Official Graalian Artist's Challenges.
If you would, please leave an idea, don't forget to explain it.

My Idea(s):
Self Portrait - Draw a picture of yourself and color it - Limit 20 Colors
Spell Animation - Make a spell - Limit 15 Frames - Limit 16 Colors
Dithering Challenge - Be givin a peice of art to dither.
AAing Challenge - Given multiple shapes to AA.