While you control Lo, the Prayers of the Voiceless Voice and a LIGHT Ritual Monster, your opponent s monsters can only target Ritual Monsters for attacks, also your opponent cannot target LIGHT monsters you control with card effects. During your Main Phase: You can add 1 Voiceless Voice card or 1 Skull Guardian Ritual Monster from your Deck to your hand, except Barrier of the Voiceless Voice . You can only use this effect of Barrier of the Voiceless Voice once per turn.