Giant Myriapod

Keen Smell. The giant myriapod has advantage on Wisdom (Perception) checks that rely on smell.

Bladed Legs. The giant myriapod can move unhindered through creatures smaller that it. If the giant myriapod enters another creatures space that creature must make a DC 14 Dexterity saving throw or take 7 (2d6 + 4) piercing damage. If the giant myriapod ends its turn with a creature sharing a space with it, that creature is moved to the nearest empty space.

Multiattack. The giant myriapod makes four attacks, one mandible attack, one bite attack, and two claw attacks.

Mandibles. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 11 (2d6 + 4) slashing damage. 

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 11 (2d6 + 4) piercing damage. Attack rolls for Bite have advantage if the target has been hit by a Mandibles attack this turn.

Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 7 (1d6 + 4) slashing damage. On a hit the target must make a DC 16 Dexterity saving throw, being restrained on a failed save.

The giant myriapod can take 3 Legendary Actions, choosing from the options below. Only one legendary action can be used at a time, and only at the end of another creature's turn. Spent Legendary Actions are regained at the start of each turn..

Devour Hatchling. The giant myriapod devours a hatchling within 5 feet of it recovering 5d10 hp.

Spawn Hatchlings (Costs 2 Actions). The giant myriapod spawns 2 hatchling myriapods in open spaces within 10 feet of it.