Paralyzing Gaze. Any creature of 6 HD or fewer that meets the Wraithworm’s gaze must succeed on a DC 13 wisdom save or be paralyzed for 2d4 rounds).

Undead Affinity. Undead creatures treat the Wraithworm as one of their own. Due to this connection, the Wraithworm has a special susceptibility to Channel Divinity: Turn Undead. When this ability is used against them, they are held motionless for 1d4 rounds.

Wraithform. For up to ten minutes per hour, the Wraithworm can turn into an insubstantial being. While it cannot fly, it can move through tiny openings and holes, such as keyholes or narrow cracks. Though they are not ethereal, creatures on the ethereal plane can interact with them normally. While in Wraithform, they gain some resistances and immunities.

Bite. Melee Weapon Attack:  +7, reach 10 ft., 1 target. Hit: (3d8+4) bludgeoning damage plus venom. The target must save on a DC 12 Constitution Save or its hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0. The target must also save on a DC 14 Constitution Save or suffer from a slow moving venom; each hour the target’s maximum HP is reduced by 3d4 HP for the next 1d6 hours, and suffers a -4 penalty to attack rolls, saving throws, and armor class during this time. This reduction lasts until the target finishes a long rest. Once a creature is affected by the slow venom, they cannot be affected by it again while it is in effect.