Dark End Dragon [LCGX-EN188] Secret Rare HER000-P put a -1 [Defense] counter

put a -1 [Defense] counter on it when the combat chain closes then destroy it if it has 0 [Defense]

You can only use this effect of “Ride of the Valkyries” once per turn

"Oxygeddon"

Set: Shonen Jump Magazine Promos Card type: Synchro/Tuner/Effect Monster Rarity: Ultra Rare Attack: 2100 Defense: 1700 1 Tuner + 1+ non-Tuner monster If this card is Synchro Summoned: You can send 1 monster from your Deck to the GY with a Level lower than this card's on the field

Pack Configuration:

Dark End Dragon [LCGX-EN188] Secret Rare HER000-P put a -1 [Defense] counterSet: Legendary Collection 2 Card type: Synchro Effect Monster Rarity: Secret Rare Attack: 2600 Defense: 2100 1 Tuner + 1 or more non Tuner DARK monsters Once per turn: You can target 1 monster your opponent controls; this card loses 500 ATK and DEF, and you send that target to the Graveyard.