japanese energy pokemon card Recycler SR Nihil Zero M3 101/080 Single variation to centering Complete Original Basic Energy Set

While most people were focused on the Lions Eye Diamonds and Lotus Vales of the world, Flash quietly picked up errata that basically made it so that you couldnt just pick a creature and not pay for it, so that you could do the enters the battlefield trick which was the exact trick the card was originally designed to allow for (albeit, long before they conceived of just how big of design constraints this could put on them in the future if they changed the types of creatures they made)

Sebastian Rosenauer Murktide Regent is the namesake card of a current top-tier Modern deck and single-handedly transformed the Izzet archetype into a powerful aggro-control competitor

The real fun though

Whenever a card says investigate, you create a colorless artifact token with the ability , Sacrifice this: Draw a card. That means you can spend 2 mana later, sacrifice the Clue, and draw a card when you need it