Мультикласс

В 3,5 мартиал адепты вершина развития файтероидов. Но до фул кластеров им как пешком до луны. Лучший убийца кастера - другой кастер.

Всё правильно сказал.

A natural roll is any roll that is made with a d20 before modifiers. These natural rolls may activate some class features, feats or magic items, but are otherwise not often a factor.

There are two special instances of natural rolls, which apply during attack rolls:

Natural 20 - For an attack roll, results in an automatic hit, and likely a Critical Hit (also known as "Crit").
Natural 1 - For an attack roll, results in an automatic miss.