Amentum

When attached to a weapon with the Thrown property, you can throw the object a further distance equal to the object's initial minimum distance. Additionally, the amentum corrects an object's trajectory while in flight; If the player rolls a 1 on the attack roll with the amentum attached, she may choose to reroll, but must take the results of the second roll.

Player must spend one minute adding or removing the amentum.