pokemon cards magikarp Gyarados 022/078 - Go - Foil - Evolution Card Lot [Electric] x2 Retreat Cost Magikarp 042/193 - Reverse Holofoil

It might not matter, because both colors can be great at the effect and green recently got Return to Nature in War of the Spark

Mass Hysteria has many more replacements in red, but Crossroads is pretty unique for green, and therefore the decks that need this effect really want this card specifically

All in all, Jumpstart: Historic Horizons might power up eight archetypes enough to make them real, competitive decks in the format

Plus, thanks to an added ability, Urgoros, the Empty One will be a lightning rod as your opponent will have to kill it before it accumulates too much card advantage

Theyre so unique that wheel decks are a specific EDH theme

Read the official announcement from Wizards of the Coast.