Solgaleo GX (Secret) (155) [SM Base Set] Grass[x2] discard 1 of them and

discard 1 of them and this attack does 30 damage plus 20 more damage (plus 10 more for the Darkness Energy you discarded)

Set: Sun & Moon: Base Set Type: Item Rarity: Secret Rare

Set: McDonald's Promos: 2015 Collection Type: Lightning Rarity: Promo Retreat cost: Colorless

Set: Mysterious Treasures Type: Fighting Rarity: Ultra Rare Retreat cost: 1 [1FF] Close Combat (80) During your opponent's next turn

Set: XY: Black Star Promos Type: Darkness Rarity: Promo Retreat cost: Colorless

Solgaleo GX (Secret) (155) [SM Base Set] Grass[x2] discard 1 of them andSet: SM Base Set Type: Metal Rarity: Secret Rare Retreat cost: 3 [MM1] Sunsteel Strike (230) Discard all Energy from this Pokemon. [M] Sol Burst GX Search your deck for up to 5 Energy cards and attach them to your Pokemon in any way you like. Then, shuffle your deck. (You can't use more than 1 GX attack in a game.)