Chesed

Chesed is the second raid boss in Blue Archive

The boss consists of two stages: For the first stage, you will face waves of Heavy armor enemies until you reach the boss room where Chesed is located for the second stage of the bossfight where you have to clear all the robots to build the stun gauge and reveal the unprotected core with zero defense when the bar is maxed out. The core will stay revealed for a period of time and then it will protect itself again, forcing you to repeat the process if you want to have it reveal itself again. The boss has extreme defenses while protected so it's recommended to focus on clearing the enemies instead to build gauge quickly.

A good general strategy for this raid boss is to focus on building one team meant to clear the waves of enemies and get to the boss while putting all your best bossing units on the second team if you aren't strong enough to kill it in one round with your best units. If you lack Penetration units then look at your Explosion damage dealers to fill some slots, they might do the trick for your clearing team and deliver that extra damage you were looking for but is strongly recommended to leave your best penetration units for fighting the boss himself if you are using Explosion units to fill some slots.