Spell for move speed outside of combat

I have been trying to research creating a spell to modify a player’s move speed when not in combat, but it’s pretty difficult to find any information/documentation on trinitycore. Most of the documentation is either blank or dead links, there are almost no comments in any of the code, so my options are read all the source code and pray or ask here. I appreciate anyone willing to point me in the right direction here. I have knowledge of c++ and mysql, I just am not quite understanding the structure of the code and how spells are dealt with.

Thanks in advance for any help.

Do you know about any other spell that does that?

Oculus’ drakes have one spell doing that.

Good idea Aokromes thanks for the info, I’ll give it a shot. You have any idea the exact name of the creature you are referencing, I can’t seem to find it.