Whether youre a new player to the series, a fan of the Yu-Gi-Oh
Bill Rose, the VP of R&D, wanted to try a Magic year that had four premier sets instead of three where none of them was a core set
Ten gates were released with that Magic set, one for each of the 10 Ravnican guilds (Izzet Guildgate, Orzhov Guildgate, and Simic Guildgate, and so on for each color pair), each of which enters the battlefield tapped and taps for 1 mana of either of the guild's colors
such is not the case because most Trainer Gallery cards either had the rarity of Character Rare (CHR) or Character Secret Rare (CSR)
So, the way these cards are in their foil, they were just never printed like this
The card reads: You may choose an artifact or creature card with mana value 1 you discarded this way, then do the same for artifact or creature cards with mana values 2 and 3. In the right decks, you basically get to pay four mana to draw some cards and put six manas worth of cards into play