3 Satoru Umezawa Gives All Creatures In Hand Ninjitsu Bearing a familiar family name, Satoru Umezawa is a blue and black creature, so it's not a pure black card and must be in decks that have both blue and black in their color identity
Additionally, there is only one known PSA 10 copy with a higher value
The Lorcana starter decks do this already (Amber & Amethyst, Emerald & Ruby, Sapphire & Steel), but players can and should experiment with other combinations
By making copies of Obeka, you'll be able to bypass more blockers (don't forget that she has menace) to stack up more upkeeps
The most important thing you need to keep in mind when building a deck is synergy, yes, but also how viable that synergy is
This baby bird, though, can grow to epic proportions very quickly