Scroll Keen Edge

When cast on an edged (piercing or slashing) weapon, it increases the critical hit range of that weapon. Thus the player can score a critical hit if the attack slide result is a natural 19 or 20. This scroll has no effect on blunt weapons or edged weapons which already have an expanded crit range. The effect lasts until the end of the room.

Note: Scoring a natural 20 is an automatic hit, but a natural 19 may not necessarily hit–even if the 19 is within the critical range of the weapon.