how to tell if yugioh cards are first edition Can someone tell me how do I know if the card is 1st edition..trying to identify these cards

When your opponent Normal or Special Summons exactly 1 monster (and no other monsters are Summoned) while this monster is on the field: You can make that monster lose ATK equal to its Level x 200 (until the end of this turn), and if you do, inflict damage to your opponent equal to the ATK lost by this effect.

Set: XY: Roaring Skies Type: Dragon Rarity: Ultra Rare Retreat cost: Colorless,Colorless

Pendant: Length 31.41 mm/1.23 inches, Width 3.39 mm/0.13 inches, Height 42.03 mm/1.65 inches

SIMPLY THE BEST CARDSCollect more hard-to-find Foundations cards with 5 cards of rarity Rare or higher in every Collector Booster, including the possibility of a Special Guest Mythic Rare card featuring a beautiful alt-frame treatment from Magics history