Scolipede (5e Creature)
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Large monstrosity, any alignment
Speed Boost. The scolipede's initiative count increases by 2 each turn it's in combat.
Swarm. While it has 50 hit points or fewer, the scolipede has advantage on attack rolls. In addition, it deals an extra 7 (2d6) damage to any target it hits with a melee attack.
Charge. If the scolipede moves at least 20 feet straight toward a target and then hits it with a Poison Jab attack on the same turn, the target takes an extra 7 (2d6) bludgeoning damage.
Poison Jab. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d8 + 2) piercing damage plus 10 (3d6) poison damage.
Poison Point. If a creature hits the whirlipede with a melee attack, it can use its reaction to force the creature to succeed on a DC 14 Constitution saving throw or be poisoned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on a success. If the saving throw is successful or the effect ends for the target, it is immune to the Whirlipede's Poison Point for 24 hours.