A necessary clarification here is that color and color identity arent the same
Less expensive option for game designers that have extra cards laying around: People have also found it useful to print on thin paper like this and put their cards in front of old trading cards
Gem Bazaar Land When Gem Bazaar comes into play, choose a random color
Then, once you hit twelve loyalty counters on a planeswalker (ideally more than that, so you can keep your planeswalker), you can take an extra turn
Modern Horizons 2 included some of the best cards for the Modern format - perhaps too many good cards in fact, as some fans have complained about its impact on the meta, which included driving out several middling deck archetypes
You want this in a storm shell interested in copying cards like Jeska's Will and Mana Geyser for huge bursts of mana to spend on Reckless Impulse and other card advantage spells