White Mage's Staff

Artifact — Equipment

{1}{W}

Job select (When this Equipment enters, create a 1/1 colorless Hero creature token, then attach this to it.) Equipped creature gets +1/+1, has "Whenever this creature attacks, you gain 1 life," and is a Cleric in addition to its other types. Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)

Rulings and every printing on Scryfall