1st edition japanese pokemon cards Base Expansion (Expedition) Pokémon Booster Pack – Loose Packs Trading Co Vintage Glossy Japanese Vending Series

There are a lot of scary creatures out there that want to get in damage without being blocked, and while the Halfling discount is really good, don't discount that this card can end a game really fast if it gets onto something else for 4 mana

its restrictive casting cost allows the designers to give it an enormous amount of power for a five mana card

Not something seen often in Magics history, but like most others that do exist, there is a limitation

Use the characteristics of Spark Double as it enters the battlefield, not of the copied permanent, to determine whether it enters with an additional counter on it

On top of that, this card replaces itself and gives the creature flying, providing it with some evasion