You can Ritual Summon this card with "Machine Angel Ritual". Once per turn: You can target 1 face-up monster you control; gain LP equal to half its ATK. When a Ritual Monster you control is targeted for an attack: You can negate the attack. If this card is in the Graveyard: You can banish 1 other "Cyber Angel" monster from your Graveyard, then target 1 monster your opponent controls; Special Summon this card, and if you do, take control of that monster.
