Soldier's Syringe

The Soldier's Syringe is a returning item in Risk of Rain 2.

Soldier's Syringe decreases the intervals between individual primary attacks and increases the animation speed of all skills by a factor of 1.15.

It should be noted that this only increases the animation speed and doesn't affect the cooldowns of those skills. Most primary skills of Survivors have no cooldown, the exception being Artificer, meaning that all other survivors get an almost direct 15% attack speed buff per syringe on their primary skill.