Sometime you need some new hooks for your custom module

there are few steps to create it and you can see a real example here: 

[https://github.com/azerothcore/azerothcore-wotlk/commit/15b1a99b55bf01cd6975cc4da3994778d36edb35](https://github.com/azerothcore/azerothcore-wotlk/commit/15b1a99b55bf01cd6975cc4da3994778d36edb35)