Canifex

Synapse. If the Tyranid is within range of a synapse node creature it gains advantage on all charisma savingthrows, +1 to their damage roles and immunity to the charmed condition.

multiattack. If equipped, the carnifex makes two attacks with its crushing claws/devourers

Living arsenal. Some Tyranid creatures may have multiple wargear options, number and damage of attacks will vary between war gear, all weapons are listen in its actions, when this carnifex enters combat it will be wielding its chitinous claws and teeth and a choice between crusher claws/scything talons/devourers, and will be equipped with: 

>2-crushing claws-2 attack 

>2-scything talons-ba

>1-Deathspitter-1 attack

>2-devourers with brainleach worms-2 attacks 

>1-heavy venom cannon-1 attack

>1-stranglethorn cannon-1 attack

Carnifex crushing claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (2d10 + 4) bludgeoning damage. 

carnifex scything talons. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 10 (2d6 + 4) slashing damage. 

Chitinous claws and teeth. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) slashing damage. 

Deathspitter with slimer maggots. RangedWeapon Attack: +7 to hit, range 30/45 ft., one target. Hit: 10 (2d6 + 4) slashing damage.

Heavy venom cannon. RangedWeapon Attack: +7 to hit, range 120/240 ft., one target. Hit: 20 (2d12 + 4) Poison damage (1d8) piercing damage.

Stranglethorn cannon. RangedWeapon Savingthrow: str save dc: 15, range 60/120 ft., one target. Hit: 7 (1d6 + 4) piercing damage and is restrained, on a failed save. 

(If equipped) carnifex extra scything talons. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 10 (2d6 + 4) slashing damage. 

bodyguard. When a friendly Tyranid creature with a cr above this carnifexs’s own cr is damaged by a weapon attack, the carnifex can instead choose to take half the damage instead.

Retaliate. When a creature approaches the back of the carnifex it can attack with its bone mace, attached to its tail.

>Bone mace. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (3d6 + 4) bludgeoning damage.