Soul Master

Once wise bug, driven mad by misuse of SOUL.

The Soul Master behaves similarly to a Soul Twister in battle, floating in the air, erratically teleporting around the battlefield and conjuring soul orbs.

Phase 1
After taking a certain amount of damage, he will temporarily "deflate." Attacking him or waiting long enough will cause him to resume attacking.

His Soul Shot can be dodged by jumping or dashing either left or right if the Soul Master is far, but it wont hit the Knight if they stand directly next to him.

When he summons the four orbs that orbit around him, approach him when he is about halfway across the arena, jump over the bottom orb when it's closest to the ground.

The easiest way to damage him is to keep attacking him from below when he is conjuring the homing orbs.

He leaves many open opportunities to heal, notably when he "deflates" after taking enough damage, and when he uses the Dash or Clock Attacks, where the player can simply move to the other side of the arena to heal.

Phase 2
After taking enough damage, the Soul Master will seem to have died, leaving behind his signature spell. However, before the Knight can absorb the spell, he reappears, breaks the ground and the battle enters its second phase.

Trivia

 * It's possible that The Radiance was the cause of the prophetic dreams the Soul Master was getting inspiration from.
 * Soul Master is the only boss to give the Knight a Spell after being defeated. That spell being Desolate Dive.
 * In the game files, he is referred to as "mage lord".
 * The Soul Master fight has some similarities with the Radiance fight such as a homing projectile attack, starting the fight off in the background to teleport into the arena and the ability to teleport as a whole.

Мастер душ