pokemon volcanion card gx your Basic Fire Pokemons attacks do 30 more damage to your opponents Active Pokemon (before applying Weakness and Resistance) Volcanion EX 26/114 - Pokemon

If your Pokmon has a single blank, cloudy orb instead of an orb with a type symbol in it for the energy cost of its attack, it may be the symbol indicating that the attack has no cost, like Alolan Vulpixs Beacon attack

Some examples are Sword of Feast and Famine, Yawgmoth, Thran Physician, and Reaver Titan

Executioner's Capsule: Somewhat limited, but with many players, someone will have a nonblack creature you want to destroy

For example, the most obvious case I can currently think of is Mad Party because now you can afford in an ideal world- discarding all your 16 Mad Party members and then using Ditto to deal massive damage for just one double colourless energy