Ephemeral Movement. The incarnation can move through other creatures and objects as if they were Difficult Terrain, and its movement doesn't provoke Opportunity Attacks. It takes 5 (1d10) Force damage if it ends its turn inside an object.

Magic Resistance. The incarnation has Advantage on saving throws against spells and other magical effects.

Multiattack. The incarnation makes three attacks, using Bite or Miasmic Globule in any combination.

Bite. Melee Attack Roll: +8, reach 5 ft. Hit:14 (2d8 + 5) Piercing damage.

Miasmic Globule. Ranged Attack Roll: +8, range 60/120 ft. Hit:15 (6d4) Acid damage, and the target's Speed is reduced by 10 feet until the end of the incarnation's next turn.

Spectral Stampede. The incarnation moves up to 80 feet in a straight line. Each creature whose space the incarnation enters is targeted once by the following effect. Dexterity Saving Throw: DC 16. Failure: 18 (4d8) Force damage. If the target is the incarnation's size or smaller, it has the Prone condition. Success: Half damage only.

Shape-Shift. The incarnation changes its size to Medium, Large, or Huge.