Invasion was filled with mana fixing cards, other sets had their Rampant Growth effects and even multiple-color unfriendly Odyssey had common lands which could be sacrificed for a third color in a pinch
Necropotence Listed at: $13 Once upon a time, Necropotence was one of the most dominant cards in MTG
Theres enough Toxic in White that I feel like this is a 2.0 One mana 1/1s that replace themselves with 1/1s tend to play reasonably well, but keep in mind that these Mites are worse than most tokens were used to not blocking is a big deal
When Magic: The Gathering found itself on Kamigawa, a plane that takes heavy cues from Japanese culture and folklore, including ninjas was obvious
Color identity is the sum of all the colors represented on the commander's rules text
I can think of my own Mono-Red Diaochan, Artful Beauty and Fumiko the Lowblood as the only ones I run that wouldn't improve with this added to their deck