Nerukai. Vision of the Sleeper is encountered in the second act of Wolcen Lords of Mayhem.
You encounter Nerukai. Vision of the Sleeper during Demon Hunting quest. This page has information about his attacks and the most effective strategies.
The boss is accompanied by allies right from the beginning of the fight. The best way to eliminate the boss's allies is to activate the apocalyptic form.
One of the most powerful attacks of this boss is an air wave that can stun you. Use dodges to avoid it.
Nerukai. Vision of the Sleeper can also move underground. If you don't move at the right time, the boss will stun you while emerging from the ground.
The enemy can also fire homing projectiles. They can hit you pretty easily if you don't avoid the shots. Try to be on the move at all times and kill the boss's ally first to increase your chances in battle.