Battlefield Tragedy

During your Main Phase 2, if no monster battled another monster this turn: You can discard 1 card; Set 1 "Battlefield Tragedy" directly from your Deck to your Spell & Trap Zone. You can only use this effect of "Battlefield Tragedy" once per turn. Once per turn, during the End Phase, if a monster battled another monster this turn: The turn player sends the top 5 cards of their Deck to the GY.