Actions

Multiattack. The desmoid makes three melee attacks or two ranged attacks.   Absorb. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: if target is unconscious, the creature is absorbed. The unconscious creature is stablized but is consumed into the desmoid. The only way the captured creature can escape is if the desmoid is destroyed. The creature gains some of the following properties based on the target absorbed:

• It can replace one of its stats with the target's.
• It can gain one of the actions, bonus actions, and/or reactions from the target.
• It can get the ability to cast one of the spells of the target, using their spell attack bonus or save DC, if it were higher than the desmoid's.
• It's max HP is increased by half of the target's max HP rounded up.
• It gains the benifits of all magic items the target was wearing.
• It gains a feat or boon of the targets.
• Its gains all languages the target knows.
• Its alignment changes to be an average of all alignments it has abosrbed.
• Its form changes to gain some physical features of the target.

If the desmoid absorbs just a magic item, it gains all the abilities of the item.   Pseudopod. Melee Weapon Attack: +3 to hit, reach 10 ft., one target. Hit: 4 (1d6) bludgeoning damage.   Sunforger. Melee Weapon Attack: +6 to hit, reach 5ft., one target. Hit: 11 (1d8 + 6) bludgeoning damage.   Thrown Sunforger. Ranged Weapon Attack: +6 to hit, reach 120ft., 20ft. radius. When it reaches that point, the weapon vanishes in an explosion, and each creature in a 20-foot-radius sphere centered on that point must make a DC 15 Dexterity saving throw, taking 6d6 fire damage on a failed save, or half as much damage on a successful one. Afterward, the desmoid can use an action to cause the weapon to reappear in their empty hand. They can't cause it to explode again until you finish a short or long rest.   Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6+3) piercing damage. If the target is a medium or smaller creature or item, it must succeed on a DC 15 Strength saving throw or placed into the extradimensional space within him. The target must make an Arcana Check (DC: 20) to escape. There is only 10 minutes of air within the space.   Shortbow. Ranged Weapon Attack: +4 to hit, range 80/320 ft., one target. Hit: 6 (1d6 + 3) piercing damage.   Lightning Blast. Ranged Weapon Attack: +4 to hit, range 120ft., 5ft wide, line. Hit: Each creature in the line excluding the desmoid and the target must make a DC 13 Dexterity saving throw, taking 4d6 lightning damage on a failed save, and half as much damage on a successful one. The lightning bolt turns back into goo when it reaches the target. Make a ranged weapon attack against the target. On a hit, the target takes 6 (1d6 + 3) piercing damage plus 12 (4d6) lightning damage.   Chain. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 11 (2d6 + 4) slashing damage. The target is grappled (escape DC 14) if the devil isn't already grappling a creature. Until this grapple ends, the target is restrained and takes 7 (2d6) piercing damage at the start of each of its turns.

Bonus Actions

Nimble Escape. The desmoid can take the Disengage or Hide action as a bonus action on each of its turns.

Reactions

Parry. The desmoid adds 3 to its AC against one melee attack that would hit it. To do so, the desmoid must see the attacker.   Extradimensional Parry. The desmoid opens a portal in his hand. The desmoid adds 3 to its AC against one non-magical ranged attack that would hit it. To do so, the desmoid must see the attacker. The projectile is absorbed.   Unnerving Mask. When a creature the devil can see starts its turn within 30 feet of the devil, the devil can create the illusion that it looks like one of the creature's departed loved ones or bitter enemies. If the creature can see the devil, it must succeed on a DC 14 Wisdom saving throw or be frightened until the end of its turn.