Spider Climb. The colossal spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Web Sense. While in contact with a web, the colossal spider knows the exact location of any other creature in contact with the same web.

Web Walker. The colossal spider ignores movement restrictions caused by webbing.

Multiattack. The Colossal Spider makes three attacks: one with its Bite and two with its Claws. It may swap out its Bite attack with either a Poison sting , Web  or Pounce attack. It may replace all these attacks with a Entangle in Webs attack.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 7 (1d8 + 3) piercing damage, and the target must make a DC 11 Constitution saving throw, taking 9 (2d8) poison damage on a failed save, or half as much damage on a successful one. If the poison damage reduces the target to 0 hit points, the target is stable but poisoned for 1 hour, even after regaining hit points, and is paralyzed while poisoned in this way.

Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 13 (1d6 + 4) slashing damage

Pounce. Ranged weapon attack: range 30ft., one target. Place the colossal spider in base contact with the target (closest available point from the initial attack location) the target must pass a DC 12 Acrobatics check or be knocked prone taking 1d12 damage.

Web (Recharge 5–6). Ranged Weapon Attack: +5 to hit, range 30/60 ft., one creature. Hit: The target is restrained by webbing. As an action, the restrained target can make a DC 12 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 10; hp 5; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage).

Poison Sting (Recharge 5–6). The colossal spider may attack one prone form in melee. Each creature in that area must make a DC 15 dex saving throw or roll a dc 15 constitution saving throw or take 22 (5d6) poison damage on a failed save, or half as much damage on a successful one.

Entangle in Webs. The colossal spider may choose to preserve its prey for later consumption. Special Attack: Auto hit, reach 5 ft., one target.
Choose one target within range that is either willing, enthralled, charmed or unconcious. Over the course of the next turn if they regain their sanity they may attempt to break free (STR DC 14) but are considered restrained. if they do not break free they are considered restrained and grappled and can only break free following a DC25 STR check. The webbing can also be attacked and destroyed by other players (AC 10; hp 25; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage).

Entangle in Webs. The colossal spider may choose to preserve its prey for later consumption. Special Attack: Auto hit, reach 5 ft., one target.
Choose one target within range that is either willing, enthralled, charmed or unconcious. Over the course of the next turn if they regain their sanity they may attempt to break free (STR DC 14) but are considered restrained. if they do not break free they are considered restrained and grappled and can only break free following a DC25 STR check. The webbing can also be attacked and destroyed by other players (AC 10; hp 25; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage).