It's the only one to make two mana, but it's the harder to use colorless
Special Summon 1 Level 11 or higher Gate Guardian monster from your hand, Deck, or Extra Deck, ignoring its Summoning conditions
Once per game, any time you could cast a sorcery (during your main phase when the stack is empty), you can pay 3 generic mana to put your companion from your sideboard into your hand
With this trading card display frame, your cards are great for transporting and storing to and from shows, or you can even hang them on the wall
They won't get players anything useful for battles or provide packs faster
(But as Pratte notes, they may sell privately for much higher and may be subject to NDAs.)The table also includes some cards that were available publicly as part of the original base set prints