[UbdU]

Originally posted by Zen:

While having diversity with their arcana they pay for it by not being powerful in any one field, no consistant access to Sabbath/Communion makes utilizing the most from them more difficult and the forging of magic path increasing items is often the only way to circumvent this.

Sorry for my ignorance; I am still learning the game. What does "Sabbath/Communion" mean in the context of the above sentence?