You can only use this card name’s (1) effect once per turn.
(1): During your Main Phase 2, if no monsters battled each other this turn: You can discard 1 card; Set 1 “Battlefield Tragedy” directly from your Deck to your Spell & Trap Zone.
(2): Once per turn, during the End Phase, if 2 monsters battled each other this turn: The turn player sends the top 5 cards of their Deck to the GY.