About Atlas Skills - Remarkable Relics

On the talent itself says "scarabs found in your maps are more likely to be less common varieties"

What does less common varieties mean in this talent? (like what type of league count as common? or just the less base type scarab?)






(Also if it means some certain leagues count as common league, will those talents which says "scarabs dropped in your maps are 100% more likely to be xxx scarabs be affected?)

thank you.