Four Kings

The  are a boss found in the Abyss through New Londo Ruins. The player will need to wear the Covenant of Artorias Ring obtained from Great Grey Wolf Sif to safely enter their battle arena.

The Four Kings each contribute 1/4 to a single health meter.

Summoning
Summon signs are most commonly found at the beginning of the New Londo Ruins, before crossing the bridges. Some summon signs can also be found right before the boss door.

Witch Beatrice's summon sign can be found hidden around a corner just before crossing the bridge to the boss fight. However, due to pathing and AI issues, she can prove less than useful.

Strategy
The battle arena is pitch-black with no visible features, and there are invisible walls to hinder progress. This not only makes navigation a hassle but also makes depth perception more difficult.

At first, one king will be present, but the second appears approximately one minute later, and a minute after that the last two will appear. It is vital to destroy each king as quickly as possible to avoid having many opponents, as they will fire a homing missile that cannot be blocked if the player is too far away from any one of them.

Keep in mind that even though there are four Kings at once, only one will engage you in direct combat. The other Kings may let out an attack every so often, but they won't bundle up around you and attack you non-stop. When you kill one King, another one enters the duel.

The kings will respawn with full HP after some time. This does not refill the boss healthbar and they can be killed again to lower it more.

The kings are fairly weak attack-wise but do have a lot of hp.

Attacks

 * A horizontal swing
 * A forward thrust with poor tracking that can be side-dodged
 * Charges up a hand and grabs the player, stealing 1 Humanity and throwing the player away. Can be side-dodged.
 * AoE explosion
 * At long range, fires an unblockable magic projectile.