Take a look at this card's best friend Grafaiai while you're at it
It was originally released for PlayStation Vita and published by Bandai Namco
This style of Energy promo is incredibly popular, and there were different Pokemon silhouettes chosen for each energy, with Ampharos covering Lightning, Ho-Oh for Fire, and Umbreon representing the Darkness Energy
That might sound innocent, and looks like it when it just copies a Sky Diamond, maybe an Idol of Oblivion for card draw
Even after gaining an unlimited number of Life Points, there is one card that can completely wipe out that gain in one move: If your opponent attacks and inflicts battle damage with "Elemental HERO Air Neos", your Life Points will essentially be lowered to match your opponent's, no matter how high they were beforehand.