Channeling Centipede

Channeling. This centipede has endured many types of damage and has evolved to be resistant to most damage types.

Soft Stomach. This creature's major weakness is its under belly. When hit on the under belly the creature receives a critical hit.

Charge. +3 to hit. If a creature is 15 ft within the range of the centipede the centiped can make a charge attack 2d6+3.

Bite. +5 to hit if a creature is within a 5 ft range. If bit by this creature the the creature takes  (1d4 +2) damage, and the target must succeed on a DC 12 Constitution saving throw or take (3d6) channeled type damage of Acid, Cold, Force, Lightning, Necrotic, Poison, or Thunder. If the effect does not apply use a poison damage. Psychic, Bludgeoning, Piercing, Slashing, or Radiant damage types. 

If the poison damage reduces the target to 0 hit points, the target is stable but poisoned for 1 hour, even after regaining hit points, and is paralyzed while poisoned in this way.

Channeling. As a reaction to its last damage type the centipede will conduct the same damage type to its next attack. This channeling effect does not apply Psychic, Bludgeoning, Piercing, Slashing, or Radiant damage types.