Yep, i don’t know how to reference him because with a new variable “BasicEnemy:Reference” it failed. 
For my first update, i reference him with a new variable “Object type” “BasicEnemy:reference”.
I can’t put my A event in the enemy blueprint because his “AIControllerClass” is “EnemyAI”, an other blueprint, and not “PlayerController”.
Let’s explain how it must work for me… Enemies move to my hero to damage him (it works, when they hit him, his health decrease and they die). To damage them, they must be overlapping an area around my hero, at this moment inputs are enable (it works) and i must kill them with A, Z, D. My problem is that i can’t set their life when i’m pressing inputs :(. I failed when i tried to create a connection between my inputs on my “Hero” (because he is the “Player Controller”) and my BasicEnemy.