Wouldn't that just move the problem to another source? We arent more allowed to use Zezenia sprites than Tibia sprites.
The solution: Someone needs to keep this project alive:
OpenTibia Sprite Pack People has been ventilating this idea through the entire OtLand for years, the "last step to cut the strings from Tibia". Now it's a reality. The images here are available under the Creative Commons Attribution 4.0 International license, you may freely use, just need to...
otland.net
Thats where our open source sprite collection is.