Crowbar

The Crowbar is a returning item in Risk of Rain 2. Attacks deal 150% damage  (+50% per stack)  when attacking any enemy or boss at or above 90% health. This is equivalent to half of the damage increase (+50%) from a critical strike  (+100%) . After stacking 3 or more crowbars, the total damage dealt is greater than a critical hit. For critical strikes with the crowbar, the damage multiplier is doubled from 150% to 300%  (+100% per critical strike per stack) .

This item can usually be overlooked for most classes due to the negligible and inconsistent damage increase it provides, however on Loader it can be especially useful to stack to have increased damage on her utility skill.