When playing the multiplayer part, I've encountered some strange behavior ingame.
My caracter was blinking and teleporting for other users and my computer was running high CPU.
When use apocalyptic form, my fps went down to 4 fps and the game was unplayable.

Everything went good when I restore the default colors of my armor. It seems that there is a problem with the usage of potion of color.

Issues :
Slowness
Unsynced player (lag when hitting mobs, other player seeing me hitting beside the mob while I was sure to hit them).
Very high CPU usage

Resolved by :
restore default color of each piece of armor => generate a big lag on the server.