Elder Evil / Star God Blessings

Through generations of study and grim practice, the disciples of certain Elder Evils & Star Gods mastered the ability to bestow supernatural gifts on minions they select for the privilege. Any creature that serves a cult of Elder Evil / Star God, including a star spawn, can be given one of these rewards - usually as compensation of faithful service, but sometimes as a chance for a creature that breached the cult's laws to redeem itself. The following powers are unique to specific cults, and typically a creature has no more than one of them.
Cult of Borem of the Lake of Boiling Mud. Borem's Embrace (1/Day). The cultist touches one creature within 5 ft of it. The target must succeed on a DC 15 Dexterity saving throw or be coated in sticky, steaming mud. While it is coated in this way, the target's speed is halved, it can't use reactions, and it takes 10 3d6 fire damage at the start of each of it's turns. The effect lasts for 1 minute, until the cultist is incapacitated or dead, or until the target is immersed in water.
Cult of Atropus the World born Dead Gaze of Corruption (Recharge 6). The cultist targets on creature it can see within 30 feet of it. The target must succeed on a DC 15 Constitution saving throw or take 16 3d10 necrotic damage and be poisoned for 1 minute. The poisoned target can repeat the saving throw at the end of each of it's turns, ending the effects on itself on a success.
Cult of Haask the Voice of Hargut Hask's Presence (1/Day). The cultist turns into a Tiny leech-like being and teleports onto the shoulder of a humanoid that it can see within 30 feet of it. The targeted humanoid must succeed on a DC 15 Charisma saving throw or be charmed by the cultist. While the target is charmed, the cultist has control of it on the target's next turn. At the end of the turn, the cultist teleports to an unoccupied space it can see within 30 feet of it and returns to it's normal form. The cultist can't be targeted directly by any attack or other effect while it's in the slug-like form, but it is subject to areas of effect as normal.
Cult of Tyranthraxus the Flamed One Radiant Flames (1/Day). Multihued flames surround the cultist for 1 minute, until the cultist is incapacitated or dead, or until the cultist extinguishes the flames (no action required). While inflamed , the cultist has telepathy with a range of 30 feet, and it can teleport as a bonus action up to 30 feet to an unoccupied space it can see. in addition, every creature that starts it's turn within 5 feet of the cultist must make a DC 15 Dexterity saving throw, taking 16 3d10 radiant damage on a failed save, or half damage on a successful one.
Cult of Tharizdun the Chained God Tharizdun;s Spark (Recharge 6). As a bonus action, the cultist touches a simple or martial weapon or a natural weapon, if it has one. The next creature hit by the touched weapon must make a DC 15 Wisdom saving throw short-term madness for 10 minutes. Consult the Short Term Madness table (see "Madness Effects" in chapter 8 of the Dungeon Master's Guide) to determine the effect of the madness. The affected creature can repeat the saving throw at the end of each minute, ending the effect on itself on a success.