Ancient Warriors Saga - Borrowing of Arrows

You can target 1 face-up monster your opponent controls and 1 "Ancient Warriors" monster you control; until the end of this turn, halve that opponent's monster's ATK, and if you do, add that lost ATK to your monster (even if this card leaves the field). If this card is sent to the GY while you control "Ancient Warriors" monsters with 2 or more different Attributes: You can place 1 "Ancient Warriors" Continuous Spell/Trap from your hand or Deck face-up on your field, except "Ancient Warriors Saga - Borrowing of Arrows". You can only use each effect of "Ancient Warriors Saga - Borrowing of Arrows" once per turn.