"Massacre" Assassin of Black (APO/S53-E066 RR) (SP) [Fate/Apocrypha]

[CONT] During this card's battle, all players cannot play "Backup" from hand. [AUTO] When this card is placed on the stage from your hand, draw up to two cards, choose a card in your hand, and put it into your waiting room. [AUTO] [Put two cards from your hand into your waiting room] When this card attacks, you may pay the cost. If you do, deal one damage to your opponent. (This damage may be canceled)