Priest is a support mage class attainable via Advance Player badge, all its moves can go through walls.
MAIN: Shoots a medium damage ball that heals teammates hurts foes, does an Armour boost to teammates and a attack debuff to enemies
Ability 1: . Shoots a cross after 0.5 seconds and apples bind to enemies if hit and does damage
Ability 2: Creates a healing AoE around the Priest that heals teammates and the Priest as long as it is hold
It is best to stay mobile and if it is Team Deathmatch or Boss fight, heal your allies, make use of the ability to heal, and the ability to bind. Above all, play it safe.