Religious Symbol

What's an item in your world that people always carry with them? A religious symbol that grants powers based on how deeply they dig into their belief system. Limited to the domain of the god they worship, for example, a Barbarian will worship the god of strength or the god of nature, a Bard will worship the god of music or the god of travelers, a Cleric will worship a god of wisdom or a god of protection, a Druid will worship a god of nature or a god of animals, a Fighter will honor a god of battle or a god of combat, a Monk will worship a god of martial arts or a god of wisdom, a Paladin will worship a king god, a Ranger will worship a god of the hunt or a god of nature, a Rogue will worship a god of thieves or a god of trickery, a Sorcerer will worship a bloodline god (i.e., a god who their family worshiped), a Warlock will worship darker and more unknown gods, Wizards will worship a god of knowledge or a god of magic, an Artificer will worship a god of creation or a god of invention, a Blood hunter will worship a god of blood or a god of vampires. The strength of the magic granted to the people is determined by their dedication to god by doing certain things. For example, a barbarian worshiping a strong god will get better magic by working out or beating people in combat,t a Bard worshiping a musical god will get better magic by practicing music daily or learning a new musical instrument, a Cleric worshiping a protection god will get better magic through protect people from any danger threatening them, a Druid worshiping a nature god will get better magic by becoming one with nature, a Fighter will honor a combat god through training in Combat maneuvers, a Monk will honor a wisdom god through self-reflection and centering, a Paladin will honor a god through service to a crown, a Ranger will honor a hunting god by offering a portion of a kill to the god, a Rougue will honor a god of thieves through giving up a portion of loot, a Sorcerer will give tribute to their ancestors, a Warlock keeps a small amount followers dedicated to the unknown god, a Wizard will study into more complex magic or just try to understand the natural world, an Artificer will try to make new things, a Blood hunter study monster and more dangerous things.