About the Slayers
Slayers appear to be man-sized humanoids dressed in demonic looking plate armor. This armor is actually a bio-mechanical suit of eldritch design for the true form of the creature is a smallish squid-like creature. However, the armor is treated as an extension of the slayer and any hit on the armor causes damage to the creature. The body armor is slow and ponderous, always striking last in melee combat. For distance travel, slayers will often ride normal horses, though they always dismount to fight.
Slayers carry only one weapon of alien design: the slay-spear. The weapon can fire a blue pulse of energy at a range of 240’ doing 3D6 damage; it has a two-shot capacity. Once all shots have been fired, the weapon can be reversed to use as a two-handed spear in melee doing 1D8 damage.
Slayers hail from another part of the galaxy and are alien to the planet Krull. They are immune to any kind of sleep or mind-control magic, and cannot be magically transformed or polymorphed, though they can be affected by a disintegrate spell. Their senses are equal to human and they have no ability to see in darkness without a light source. They will not communicate and cannot be reasoned with or bribed; their loyalty is only to the Beast of the Black Fortress. If reduced to 0 hit points, the slayer gives off a keening shriek and will abandon its armor burrowing into the ground, never to be seen again.
Prince Colwyn and his allies who were on a mission to rescue his bride Princess Lyssa, use captured Fire Mares (the only transport fast enough to reach the teleporting fortress in the same day) to reach the Black Fortress, but are attacked by Slayers, who kill Rhun. When they get to the Black Fortress, Rell uses his massive strength to hold open the huge doors long enough for the others to enter. He dies when the entrance closes, crushing him. Kegan is killed by a Slayer shortly afterwards and Colwyn gets lost in the labyrinthine interior. When the Slayers try to kill Titch, Ergo magically transforms into a tiger and kills the Slayers, injuring himself while saving Titch's life. Torquil and Oswyn are caught in a trap with slowly closing walls studded with massive spikes.
Colwyn injures the Beast with the Glaive and finds Lyssa. He is unable to recover the Glaive from the Beast's body. Lyssa realizes that her ability to project flame can finish the beast. The two use the flame to slay the Beast and they make their way out of the crumbling Fortress, finding Torquil and Oswyn and retrieving Ergo and Titch. Colwyn uses the fire to blast his way out of the Fortress, which collapses and disappears. The Beast and his army of Slayers were no more.