Is it possible in the world to find the \"gloves\" to caste spells? (Elex)

Good evening. Is it possible the world to the glove for caste Saklaw Bercow and the Clergy?
I'm interested in in the first place. what item allows you to cast All three spells Clerics? What item allows you to cast all three spells Berseker?
Is it possible to find these items in the world or only available from NPCs. when joining a faction?