Amorphous. The Bride can move through a space as narrow as 1 inch without expending extra movement to do so.

Legendary Resistance (3/Day). If the Bride fails a saving throw, he can choose to succeed instead.

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

Spider Climb. The Bride can climb difficult surfaces, including along ceilings, without needing to make an ability check.

Unusual Nature. The Bride does not need to eat, drink, breathe, or sleep.

Multiattack. The blob makes two Pseudopod attacks. It can replace one with Ensnare.

Pseudopod. Melee Attack Roll: +11, reach 30 ft. Hit: 25 (3d12 + 6) Bludgeoning damage.

Ensnare. Melee Attack Roll: +11, reach 20 ft. Hit: 17 (2d10 + 6) Force damage and Dexterity Saving throw: DC 17. Failure: The creature is Grappled. The Bride may have up to 6 creatures Grappled.

Sand Storm (Recharge 5-6). The Bride blasts foes with sand. Dexterity Saving Throw: DC 16, all creatures in a 60-foot Cone. Failure: 19 (3d10 + 3) Force damage and Blinded for 1 minute. Creatures Blinded in this way may make a Constitution saving throw (DC 16) at the end of each of their turns, ending the effect on a success. Success: Half damage only.

Shape-Shift. The Bride shape-shifts into a Huge or smaller Humanoid, or it returns to its true form. Its game statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying isn't transformed.

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

Crush. Melee Attack Roll: +11, reach 30 ft., one target Grappled by the Bride. Hit: 26 (4d12) Bludgeoning damage. The Bride makes this attack with Advantage.

Entrapment. The Bride makes an Ensnare attack. It can't take this action again until the start of its next turn.

Slither. The Bride moves up to half its Speed without invoking Opportunity Attacks and makes a Pseudopod attack.

Wedding Bells. Wisdom Saving Throw: DC 16, one creature within 5 ft. of the Bride that it can see. Failure: 12 (2d8 + 3) Psychic damage and is Frightened by the Bride for 1 minute. A creature Frightened in this way can repeat this saving throw at the end of each of its turns, ending the effect on a success. It can't take this action again until the start of its next turn.