You can:
1.You can change the line (add details)
2.You can submit art to DA
3.You may use the work for free use on the Internet
4.You can use lineart for practice for howrse
You can't:
1.You can not delete my copyright
2.You can not assign authorship of art
3.You can not use it for Howrse as coat
4.You can not use my work for profit (real or virtual)
Please quote my authorship.
Thank you!