They are the same as common cards but the name is written in either silver or gold (silver pull rate is 1:24 packs and gold is 1:48 packs)
Incapsula incident ID: 1535000680225096259-546799356070531344
On eBay , it will cost you close to $200 for a World Championship Gaea's Cradle, which is less than you'd pay for a tournament-playable copy for sure but also a ton to pay for a card that is explicitly not legal for tournament play
Look for: The condition of the card, including corners, edges, and surface
Much like Equipment, Auras, and traditional Vehicles, they risk clogging your hand if you draw too many without enough creatures to station them
I cant wait to jam this a bit more this year in decks that Rhystic is too strong for