Ixalan Rules Changes · 5:55pm Aug 28th, 2017
It looks like with the upcoming release of Ixalan, the next Magic: the Gathering set, there's going to be a fairly major rules change. From this point on, there will no longer be a planeswalker uniqueness rule (saying that only one planeswalker of the same subtype can exist on one side of the battlefield) and instead all planeswalkers will be errata'd to be legendary permanents. In addition to other things, this means you can now play all four Nissa planeswalkers at the same time after the upcoming Standard rotation.
Coinciding with this update, I've altered the text of Twilight Sparkle's planeswalker card on chapter 2 of My Little Planeswalker so that she is a legendary permanent. In addition, the order of her mana symbols has been changed: much like the Jeskai, her mana cost is listed as URW instead of RWU, emphasizing that despite her red and white qualities, blue is the color her philosophy is centered on.
Um... Jeskai is URW, man.
Neat. Thanks for the Planeswalker news.
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Whoops, yeah, you're right. I'd written it as URW in the chapter, not sure how I missed it here.