plasma pokemon cards Articuno EX Storm | Pokémon Official Pokemon TCG card from the Black Pokemon Plasma Blast Uncommon Chatot

This list focuses on modern combos from the Sword & Shield era to the Mega Evolution era (with one exception) that could be legally played in the standard format before they rotated out of legality

Shadow in the Warp I like to joke that Shadow in the Warp is just Sol Ring and Sulfuric Vortex combined in one card

City of Traitors offers a similar, though more costly effect

At the same time, this set has been around the longest, so one could argue that the rarest card in the game in terms of how many players have it may be the Gold Crown version of Eevee Bag since it's the newest release

GX cards followed in 2017 during the Sun & Moon era