Broodmother Lysrix

Legendary Resistance (3/Day). If Broodmother Lysrix fails a saving throw, it can choose to succeed instead.

Multiattack. Broodmother Lysrix can use its Arachnophobia. It then makes three attacks: one with its bite and two with its pedipalp slash.

Bite. Melee weapon attack: +11 to hit, reach 5 ft, one target. Hit: 19 (2d10+8) piercing damage plus 4 (1d8) poison damage.

Pedipalp Slash. Melee weapon attack: +11 to hit, reach 10 ft, one target. Hit: 14 (2d8+6) piercing damage.

Web Strand. Ranged Weapon Attack: +13 to hit, reach 120 ft., one creature. Hit: The target is grappled (escape DC 18). The web strand can be attacked and destroyed (AC 12; 20 hit points; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage). The spider can grapple up to six creatures at a time using its web strands.

Reel. The spider pulls each creature grappled by it up to 60 feet straight toward itself. 

Arachnophobia. Each creature of Broodmother Lysrix's choice that is within 120 ft. of the spider and aware of it must succeed on a DC 15 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to the spider’s Frightful Presence for the next 24 hours.

Acid Shots (Recharge 5-6). Broodmother Lysrix shoots acid balls in a 60-foot cone. Each creature in that area must make a DC 17 Constitution saving throw, taking 54 (12d8) acid damage on a failed save, or half as much damage on a successful one.

Broodmother Lysrix can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time, and only at the end of another creature’s turn. Broodmother Lysrix regains spent legendary actions at the start of its turn.

Pedipalp Slash. Melee weapon attack: +11 to hit, reach 10 ft, one target. Hit: 14 (2d8+6) piercing damage.

Many Eyes. All creatures within 20 ft of Broodmother Lysrix must make a DC 19 Stealth saving throw or be instantly revealed, upon being revealed Broodmother Lysrix has the option to make an immediate opportunity attack.

Torporing Slam. (Cost 2 actions) All creatures within 20 ft of Broodmother Lysrix must make a DC 21 Consitution saving throw or take 31 (5d10+5) force damage and be stunned and incapacitated, creatures have the option to roll saving throws (DC 16 constitution) every turn in an attempt to get back up.