Well, there's reeeeeeeeeeeeeeeally lots of Orochi. Even chinese edits. So there's a pretty big load to go. And of course many links will come too :D. Atm will guide with MFFA links:
Yamata No Orochi:
Worthy Trade Orochi
Apocalyptic Orochi:
http://mugenfreeforall.com/topic/22051-apocalyptic-orochi/#comment-232753
Abandon Day Emperor
Mizuchi-A2
Baldiel
Apachai
Exile
Inazumachi
Powerful Light
Genie de caerula
Agaliarept
Blue The Dream
Jountechi
Singer Orochi
OR-Orochi
Zechael Type-S
Angel Wings v2
Jigsaw
Mysterious Green v2
http://mugenfreeforall.com/topic/10941-orochi-edits-mysterious-green-v2/