Keen
Upgrade
Prerequisites This upgrade can only be applied to an attack that incorporates an attack roll.
The attack threatens a critical hit if the attack roll results in a natural 19 (that is, a 19 on the dice before modifiers). When a critical hit is threatened, you roll a second attack roll at the same modifier before rolling damage or other effects called a "critical confirmation roll". If this second attack hits, you deal maximum damage and critical effect as if the attack had been a natural 20.
Tier 2 Apply the same effects to a roll of an 18, but your critical confirmation roll suffers disadvantage on an 18.
Tier 3 Your critical confirmation roll no longer suffers disadvantage on an 18.
Tier 4 Apply the same effects to a roll of an 17, but your critical confirmation roll suffers disadvantage on an 17.
Tier 5 Your critical confirmation roll no longer suffers disadvantage on an 17.
Tier 6 Apply the same effects to a roll of an 16, but your critical confirmation roll suffers disadvantage on an 16.
Tier 7 Your critical confirmation roll no longer suffers disadvantage on an 16.