Make an invisible mob spawn an another mob when touched

Welcome, here is my first tutorial, in english for sure ! I'm French but i want to make a tutorial for this awesome plugin Mythic mobs !

Today, i'm here to tell you how to create a mob when you punch him, it will appear and you can fight him :

Here is the version i use :

Mythic Mobs : v4.1.0
Spigot : 1.11.2 (latest)

First, you have to known you have to use just a mob.yml file, not skill, good, no ?

So let's start this tutorial :

You have to create two mob for this...

Make an invisible mob spawn an another mob when touched