There is a legacy client called Pokmon TCG Online thats more than a decade old, and the newer Pokmon TCG Live that was released stateside as part of an ongoing beta in March 2022
Theyve since shown up sporadically in sets, but often included in bonus sheets, particularly for Remastered sets (like Ravnica Remastered ) and Universes Beyond sets (like Fallout )
It had a similar issue to Up the Beanstalk where cantripping on ETB made it safe to play in most scenarios, and this one even spotted you extra power and toughness the turn you played it
Goblin Game Goblin Game is a card that reads like an un-set card, but it isn't
BT11-067 U Digimon Lv.5 Gigadramon Color Black Cost 7 DP 7000 Digivolve Cost 1 Black 3 from Lv.4 Form Ultimate Attribute Virus Type Cyborg Card Text 1 [Effect] Jamming (This Digimon can't be deleted in battles against Security Digimon.) Card Text 2 [Inherited Effect] Reboot (Unsuspend this Digimon during your opponent's unsuspend phase.) BT11-068 R Digimon Lv.5 Mamemon Color Black Cost 7 DP 6000 Digivolve Cost 1 BlackGreen 3 from Lv.4 Form Ultimate Attribute Data Type Mutant Card Text 1 [Effect] [On Play][When Digivolving] Reveal the top 5 cards of your deck
The Locked Water Gem Box can only be opened with a Golden Gem Key
