You can Ritual Summon this card with "Machine Angel Ritual". If this card is Ritual Summoned: You can make your opponent send 1 monster they control to the Graveyard (their choice). If a Ritual Monster you control attacks a Defense Position monster, inflict piercing battle damage to your opponent. Once per turn, during your End Phase: You can target 1 Ritual Monster or 1 "Machine Angel Ritual" in your Graveyard; add it to your hand.