mewtwo pokemon card 2023 EX 001/020 svEM MINT Japanese n902 [Psychic][Psychic][Colorless] Mewtwo - Trick or Trade

You must pay any mandatory additional costs (such as sacrificing a creature) and you may pay any optional additional costs (such as kicker) for the card you cast

Azorius Guildgate Baldur's Gate Basilisk Gate Black Dragon Gate Boros Guildgate Citadel Gate Cliffgate Dimir Guildgate Gateway Plaza Golgari Guildgate Gond Gate Gruul Guildgate Heap Gate Izzet Guildgate Manor Gate Orzhov Guildgate Rakdos Guildgate Sea Gate Selesnya Guildgate Simic Guildgate Talon Gates of Madara The Black Gate Thran Portal

In Commander, if you play a mono-color deck (say, mono-black), all cards in your deck must have the same mono-color identity

The creative team would then run with the idea of the guildgates and turned them into a major part of the story