Stone-Tongue Basilisk [Odyssey Promos] Nightmare Horse you can send this card

you can send this card from your hand to the Graveyard during the Damage Step to have that monsters gain 1400 ATK until the End Phase

in face-up Defense Position

When the mosnter is destroyed

Set: XY: Trainer Kit - Sylveon Type: Fairy Rarity: Promo Retreat cost: Colorless

Stone-Tongue Basilisk [Odyssey Promos] Nightmare Horse you can send this cardSet: Odyssey Promos Type: Creature Basilisk Rarity: Rare Cost: {4}{G}{G}{G} Whenever Stone Tongue Basilisk deals combat damage to a creature, destroy that creature at end of combat. Threshold As long as seven or more cards are in your graveyard, all creatures able to block Stone Tongue Basilisk do so.