Note that unlike other Spellslingers, she only triggers for instants, not sorceries too, but Red has instant speed burn, card flow like Big Score, and removal like Chaos Warp, Blue has counters, cantrips, actual card draw, and creature removal in Pongify and bounce like Cyclonic Rift, and then Green adds in more removal like Beast Within
Even though Naturalize isn't breaking colour pie it shows the willingness to do adventurous things and I am all for it
Legendary Planeswalker - Nissa Interaction (CTRL to add secondary) Land Land (CTRL to add secondary) Protection Vigor Trample If damage would be dealt to another creature you control, prevent that damage
A card being on The List does not make it legal in Standard, though