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

Web Walker. The Weaver ignores movement restrictions caused by webs, and it knows the location of any other creature in contact with the same web.

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

Bind. The Weverar regain 15 Hit points at the start of her turn, as long she has at least 1 hit point remaining and unless she took slashing damage since her last turn.

Psychic Silk. Any creature restrained by the weaver loses the resistance to psychic damage. The weaver can also choose at any time for a creature that is restrain by it to no longer be restrained.

Multiattack. The Weaver makes four attack using her Needle. The Weaver can also replace two of her attacks with her Shere Mind action, Spellcasting or the Puppet Master action if available. 

Needle. Melee or Ranged Attack Roll: +10, reach 10 ft. or range 60 ft. Hit: 17 (3d6 + 6) Psychic damage and the target has the Restrained Condition until the end of its turn. Hit or Miss: The needle magically returns to the weavers hand or hovers within 5 feet of the Weaver immediately after a ranged attack.

Shere Mind. Intelligence Saving Throw: DC 16, one creature restrained by the Weaver with in 10 feet. Failure: the target takes 42 (12d6) psychic damage and the targets intelligence, wisdom and charisma score is reduced by 1d4-1 down to minimum of 1 until the its next short rest. Success: Half damage only. Failure or Success: once a creature reaches 5 in any of the three scores the become vulnerable psychic damage dealt by the Weaver.

Puppet Master (2x Short Rest). The Weaver casts Dominate Monster on a creature currently Restrained by the Weaver, requiring no spell components and using the same spellcasting ability as Spellcasting. When cast in this way the spell does not require consternation and when the target takes Slashing damage they have advantage on the saving throw.

Spellcasting. The Weaver casts one of the following spells, using Intelligence as the spellcasting ability (spell save DC 17, +9 to spell attacks):

At Will: Detect Magic, Detect Thoughts, Disguise Self, Web, Major Image, Dissonant Whispers, Invisibility

2/Day Each: Dispel Magic, Slow, Dream

1/Day Each: Steel Wind Strike, Scrying

Swift Step. The alienist teleports to an unoccupied space it can see within 40 feet.

Web Cage (Recharge 6). Dexterity Saving Throw: DC 16, each creature in a 15-foot radius, 40-foot tall Cylinder centered on a point the cataclysm can see within 120 feet. Failure: the target takes 14 (4d6) Psychic damage and the target has the Grappled condition (escape DC 16) until they take Slashing or Fire damage. While Grappled, the target has the Restrained condition.

Spell Mimicry. Trigger: a creature cast a spell of 5th level or lower that the weaver can see. Responds: the Weaver is able to cast that spell using her Spellcasting once within the next 24 hours at its lowest level.