Bullet King

Bullet King is a boss found in the Keep of the Lead Lord.

Behavior
The boss will continuously follow the player while attacking. His attacks include:
 * Spinning and firing continuous volleys of bullets, each wave alternating in direction. This is followed by a tight-knit circle of bullets, which requires a dodge roll or a blank to avoid. This leaves Bullet King stunned for a moment.
 * Firing a circular volley of spiral shaped, accelerating bullets that curve slightly.
 * Firing two spreads of three bullets at the player.
 * Firing a large bullet upwards which bursts into 8 smaller bullets, each of which bursts into 8 more bullets.
 * Firing twelve lines of four bullets in all directions.
 * Throwing a flask that ignites the ground.

Bullet King is also accompanied by his chancellor, who will charge at the player if damaged.

Strategy
Bullet King is perfectly manageable as long as you can stay at mid to long range. Do not let him back you into a corner, for most of his patterns are extremely tight at first, but offer generous openings as they advance further - thus, the farther away you are from him, the more easily you can dodge his attacks. If he is starting to push you very close to a wall, concentrate on getting to the open side of the room before resuming fire. Because the large burst bullet attack always starts going up, you should make an effort to not cross above him or risk being forced to blank.

If the chancellor takes damage, he will charge right at you. He is easy to kill, but may be hard to spot when you're focusing on dodging bullets. Either deliberately take him out or make sure you don't accidentally hit him.

The large bullet that splits into many can be destroyed with Blasphemy to skip the attack and prevent it from splitting.

The fire flask can be deflected away from the player by shooting it in midair. It will still ignite the ground where it lands.

Trivia

 * Bullet King's "Lead Throne" (made of guns fused together) is a reference to the Iron Throne (a throne made entirely of swords fused by dragon fire) from the Game Of Thrones TV Series/novel.
 * There is a discrepancy between the intro/ammonomicon art and the in-game sprite - the two crowns do not match.
 * Bullet King seems to have connections to the Trigger Twins in the physical version of the ammonomicon.