mtg revised edition booster box pack opened for your Holiday entertainment! Magic The Gathering MTG Revised

It could help you stabilize versus aggro though, especially if you can trade off the body afterwards

Play 2-3 copies

Every Pokmon set eventually goes out of print, naturally increasing the price of the cards

(In the English dub it's changed to a "dark energy disk", meaning that I was in for a surprise when I read the manga.) The fact that Dark Magician Girl literally saves Yugi from the brink of death stuck with me, and I distinctly remember telling my parents "If I ever get in trouble, the Dark Magician Girl will save me!" I think that declaration was less about escaping the jaws of death and more about seeking some genuine thrills

Aster has them both beat with his own newer Elemental/Destiny Heroes