Yizekro is a relatively new demon lord that sprung into being after a snake within the Gaping Maw became infested with Abyssal power. He soon snuck his way out of the realm and has consolidated power in the once lordless realm of Sheiqulac, which he competes with the Dark Prince Graz'zt over. His breath has an enchanting property to it that draws other creatures in, which has allowed him to gather other creatures to his realm.

The Hissing Lord takes the form of a massive viper with a length of 135 feet and a diameter of roughly 10 feet. He has reflective, scarlet scales that radiate burning heat. The ridge above his eyes are lined with spiny scales, though he lost his left eye long ago when an army of yuan-ti soldiers stole it for their emperor. Since then, he has plotted to retrieve his missing eye and has sent agents to the Material Plane to find it

While Yizekro is perfectly capable of physically dominating creatures to do his bidding, he much prefers to rest in his lair and lure other creatures to him so that he can either make them his servants or his prey. The handful of cults that dedicate themselves to him go out and enslave the minds of other creatures so that they can eventually serve this same purpose.

Yizekro’s Lair

Yizekro's lair lies underneath an expansive oasis in the endless desert realm of Sheiqulac in the Abyss. His palace, called Tlectos, is a sandstone tower riddled with holes and tunnels for serpents to slither through. The waters of the oasis have a hallucinatory property, enticing creatures to linger and become prey for the gargantuan serpents that inhabit the realm. Yizekro's influence causes creatures traversing the desert to always find their way to the oasis and to feel a false sense of safety before succumbing to the demon lord's madness.

Lair Actions

On initiative count 20 (losing initiative ties), Yizekro can take a lair action to cause one of the following effects; he can’t use the same effect two rounds in a row.

• Yizekro causes the ground in a 10 foot square in his lair to become quicksand for 1 hour. Creatures that start their turn in the area or enter the area for the first time on its turn must make a DC 22 Strength saving throw or become restrained. While restrained, a creature must repeat the saving throw at the start of each of its turns. After three successes, a creature frees itself from the sand and can use its reaction to move to an unoccupied space outside of the area. After three failures, the creature sinks below the sand and begins to suffocate. A creature within 5 feet of a restrained creature can use its action to make a DC 22 Strength check, freeing the target on a success.
• Yizekro releases his Entrancing Gas, but has it originate from a snake in his lair rather than himself.

Regional Effects

The region containing Yizekro’s lair is warped by his magic, creating one or more of the following effects:

• Venomous snakes within the 6 miles stalk and become hostile to other non-snake creatures.
• Any creature that drinks water in the lair feels a strong inclination to stay.
• If a humanoid spends at least 1 hour within 1 mile of the lair, that creature must succeed on a DC 17 Wisdom saving throw or descend into a madness determined by the Madness of Yizekro table. A creature that succeeds on this saving throw can’t be affected by this regional effect again for 24 hours.

If Yizekro dies, these effects fade over the course of 1d10 days.

Madness of Yizekro

If a creature goes mad in Yizekro’s lair or within line of sight of the demon lord, roll on the Madness of Yizekro table to determine the nature of the madness, which is a character flaw that lasts until cured.

Madness of Yizekro