Door Lord

Door Lord is a boss that has a 1.3333% chance to replace any boss in the Gungeon Proper, Black Powder Mine, or Hollow.

Behavior
Door Lord has multiple attacks.
 * Fires a large ring of bullets that expand and drift in a random direction.
 * Fires two rings of bullets that pulse outwards along with several waving lines of bullets.
 * Fires several spreads of triangular bullets at the player.
 * Breathes a cone of flaming bullets towards the player.
 * Stands still and shoots a laser at the player that ignites the ground. While firing the laser, he will either rapidly spin or rotate back and forth, following the player's movements.
 * Disappears, sending out a ring of bullets, then reappears somewhere else, sending out another ring of bullets.

Trivia

 * Killing the Door Lord counts towards Frifle and the Grey Mauser's challenge to kill 3 mimics.
 * Even though the boss door transforms into Door Lord during his intro, the actual door will still be there, even after the boss fight.
 * The name may be a reference to the door lord from the television show Adventure Time.
 * The Door Lord is the only secret boss to appear in the boss rush.