Blight Colosus

Blighted Fog. Living things within 20 feet of this creature suffer the effects of foul mist.  Any player within 20 feet must make a DC (15) constitution save.  On a failure, the player takes 1d6 necrotic damage.  On a natural 1, they also receive a point of exhaustion

Nightmarish Visage. When a creature enters melee range, it must make a DC (17) Wisdom save.  On a save, the creature cannot be effected by this for 24 hours.  On failure, the creature gains the frightened condition.  The creature can make a saving throw DC (15) at the end of its turn to end this condition.

Multiattack. The Blight Colossus makes 2 tentacle whip attacks and 1 slam attack.

Tentacle. Melee Attack Roll: +9, reach 15 ft. Hit: 12 (2d6 + 5) Bludgeoning damage. If the target is a Large or smaller creature, it has the grappled condition (escape DC 14) from one of four tentacles.

Slam. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 16 (3d6 +6) bludgeoning damage.

Wither. Constitution Saving Throw: DC 16, one creature currently grappled by the Blight Colossus. Failure: 10 (3d6) Necrotic damage which the Blight Colossus gains as temporary hit points. Success: No effect.

Obscuring Mist. The Blight Colossus pushes out additional mist from its orifices obscuring the vision of all within a 20ft radius.  Until the end of its next turn, attacks made within this range are done with disadvantage.  For ranged attacks from outside of the mist, the Blight Colossus is given 3/4 cover.  Recharge: (5/6)

Misty Illusion. (3 charges) As a reaction, the Blight Colossus may create a distracting illusion within the mist to attempt to cause an attack against it to miss.  Roll a d20.  On an odd number, the attack still hits.  On an even number, the attack misses.

Legendary Action Uses: 3.  Immediately after another creature's turn, the Blight Colossus can expend a use to take one of the following actions.  The Blight Colossus regains all expended uses at the start of each of its turns.

Assimilation (Costs 2 Actions)(2/day). The Blight Colossus suffuses its mist into the surrounding area and draws on the surrounding life force.  Pulling the life force from the land, it heals (3d10).  Each creature within 20 ft must make a DC 13 constitution saving throw or suffer (2d6) necrotic damage, which the Blight Colossus gains as temporary hit points.

Stomp (Costs 1 Action).  The Blight Colossus slams its feet into the ground with enormous feet, shaking the very earth below your feed.  Each creature within 30 ft who is currently on the ground must make a DC 13 athletics or acrobatics check or be knocked prone.

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