The Blowgun is a rangedweapon exclusive to the Bad Seed DLC. It fires small, fast moving projectiles which poisons victims and deals critical damage to enemies if they are shot in the back.
The synergies of Blowgun are very similar to that of Assassin's Dagger. The only difference is that the former scales on Tactics while the latter scales on Brutality.
Phaser and Meat Skewer can be used on both of these weapons as they both bring you behind the enemy and both scale on the stats mentioned above.
Notes
The Blowgun works just like the Assassin's Dagger, as both deal critical damage by hitting an enemy in the back.
Enemies like Protectors, or bosses like the Giant, can not take critical damage from the Blowgun because they do not have a visible backside.
The Blowgun has the highest critical hit multiplier in the game alongside the Marksman's Bow with a multiplier of ~6x damage.
Affixes such as "+40% damage on burning targets" apply to this projectile damage as well as the inflicted poison status.
The affix "+80% damage to poisoned targets" can be applied to The Blowgun