She rolls d12+4 on the damage roll, getting a 7.
For example, Bertha rolls a critical hit on a Greataxe swing.
When you roll a critical hit, you keep your original damage roll and roll all of the dice again. It can also occur when you are trying to break an object and you roll a 20 on it. DnD 5E Critical Hits GuideĪ “critical hit” usually occurs in combat when you roll a 20 on an attack roll. If you’ve played earlier editions of D&D, or if you’re brand new to the system, our DnD 5E Critical Hits guide will help you to understand things better. However, critical hits in 5E work a bit differently than they do in previous editions. In combat, rolling a 20 when attacking someone means you’ve struck an artery, or the jugular, and your damage increases massively. In any dice game, rolling a 20 on a 20-sided dice is a huge sign of success… or utter horror, if the DM rolls it.