AbilityRestoration
Once during your turn (before your attack), if this Pokémon is in your discard pile, you may put it onto your Bench. Then, attach a Darkness Energy card from your discard pile to this Pokémon.

Hidden Fates Shiny Vault is a set in the Sun & Moon series. It was released on August 23, 2019. The printed size is 94, and the checklist is the same length. Darkrai-GX is SV70/94, in position 70 of 94 on this checklist. Before it is SV69 Umbreon-GX, and after it is SV71 Guzzlord-GX. The listed rarity is Rare Shiny GX.
Darkrai-GX is a Basic GX Darkness Pokémon with 180 HP. In the Pokédex this is Darkrai (#491), generation 4 (Sinnoh).
5ban Graphics illustrated this card. The same name is on 1,629 other cards in the catalog.
Darkrai (#491) has 40 other cards in the catalog. Those other cards are in 22 sets. The other printings with a release date run from 2007 to 2026. The earliest other card is Darkrai LV.X DP19/56 in DP Black Star Promos (2007). That card is named Darkrai LV.X, while this one is Darkrai-GX. That card lists 100 HP, and this one lists 180 HP. The rarity there is Promo, and here it is Rare Shiny GX. Shizurow illustrated that card, and 5ban Graphics illustrated this one. Retreat cost there is 1, and here it is 2. 30 other cards of Darkrai list a different HP.
Restoration is listed as Ability. Once during your turn (before your attack), if this Pokémon is in your discard pile, you may put it onto your Bench. Then, attach a Darkness Energy card from your discard pile to this Pokémon. The attack Dark Cleave lists 130 damage. The cost is Darkness, Darkness, Colorless. This attack's damage isn't affected by Resistance. Dead End-GX is another attack lists no damage number. The cost is Darkness, Darkness, Colorless. If your opponent's Active Pokémon is affected by a Special Condition, that Pokémon is Knocked Out. (You can't use more than 1 GX attack in a game.) Weakness is Fighting ×2. Resistance is Psychic -20. Retreat cost is 2. The card text says: Pokémon-GX rule: When your Pokémon-GX is Knocked Out, your opponent takes 2 Prize cards.
I keep a set binder for Hidden Fates Shiny Vault, meant to hold every card of that set. This card is one slot in the Hidden Fates Shiny Vault set binder. A generation binder holds one card of each species. Darkrai can fill a slot in Generation 4 binder (Sinnoh). I still need this card.
Once during your turn (before your attack), if this Pokémon is in your discard pile, you may put it onto your Bench. Then, attach a Darkness Energy card from your discard pile to this Pokémon.
This attack's damage isn't affected by Resistance.
If your opponent's Active Pokémon is affected by a Special Condition, that Pokémon is Knocked Out. (You can't use more than 1 GX attack in a game.)
Pokémon-GX rule: When your Pokémon-GX is Knocked Out, your opponent takes 2 Prize cards.
Hidden Fates Shiny Vault, in the Sun & Moon series. It was released on August 23, 2019. The printed size is 94.
SV70/94. It is entry 70 of 94 in this checklist.
5ban Graphics. The catalog lists 1,629 other cards with that illustrator.
Rare Shiny GX.
Darkrai #491, generation 4 (Sinnoh).
Dark Cleave (130) and Dead End-GX.