A natural 20 is a critical hit. Some builds aim for these crits. But how can a player maximize their chance of scoring a crit?
I know a few, some more reliable than others:
- A champion fighter gets crits on a natural 19-20 (18-20 at level 15).
- A rogue assassin attacking a surprised creature will auto-crit.
- A divination wizard can roll a 20 during a rest and spend it on themselves or an ally for a crit.
- Any advantage of course gives greater chance of getting a 20.