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Oil of Accuracy
Oil of Accuracy
Uncommon
Coat your weapon to receive a +2 bonus to Attack Rolls with the oiled weapon.
This slick oil helps your weapon slip through the tiniest of cracks in an enemy's defences.
Single Use 
This slick oil helps your weapon slip through the tiniest of cracks in an enemy's defences. Single Use
Discussion
does this last till long rest
Nope, 10 turns only