FLIP: You can add 1 "Tindangle" card from your Deck to your hand. When this card is Normal Summoned: You can send 1 "Tindangle" card from your Deck to the GY. If a monster(s) is Special Summoned to your field in face-down Defense Position while this card is in your GY: Special Summon this card in face-down Defense Position (this is not optional). You can only use each effect of "Tindangle Intruder" once per turn.