And d'ya remember the sword of Crota mission? Wielding the relic is a little like the sword except you have to 'cleanse' teammates by forming a bubble by holding L1 when your grenade slot charges. You'll see a prompt saying 'Marked For Negation' and you'll slowly go blind until you're cleansed. Other than that it's R2 does a shoulder bash Double jumping and R2 does a slam (best move) R1 does a quick attack and using your super with the shield fires a ball of light that takes the first boss' shields down and deals good damage to Atheon.