Crimson Trampler

Multiattack. The trampler makes one Tentacle Slam attack and one Stomp attack.

Tentacle Slam. Melee Attack Roll: +8 to hit, reach 15 ft. Hit: 16 (2d8+6) bludgeoning damage, and the target has the Grappled condition (escape DC 15). At the start of each of it's turns while the trampler is grappling a creature, the target takes an additional 13 (2d6+6) bludgeoning damage. If the trampler moves at least 20 ft. straight toward the target before it hits with this attack, Strength Saving Throw: DC 15, one creature within 5 ft. of the trampler after it moves 20 ft. straight toward it. Failure: The target has the Prone condition, and the trampler can make one Stomp attack against the target as a bonus action. 

Stomp. Melee Attack Roll: +8 to hit, reach 10 ft. Hit: 20 (3d10+6) bludgeoning damage.

Ink Cloud (Recharge 5-6).The trampler releases a cloud of ink in a 30 ft. radius around itself The area becomes Heavily Obscured for 1 minute. The cloud can be dispersed by a strong wind. Constitution Saving Throw: DC 16, each creature that starts it's turn within the ink cloud. Failure: 13 (3d8) poison damage. Success: Half damage.

Gore-Fueled Fury. The trampler's rage is stoked at the sight of blood. Trigger: The trampler reduces a creature to 0 hit points. Response: The trampler moves up to half it's speed and makes a Tentacle Slam attack.

Relentless Stampede. Trigger: The trampler takes damage from an attack. Response: The trampler moves up to half it's speed toward the attacker.