One location might grant bonuses to characters when they visit that location - how this works is a mystery, for now - while another might bestow passive benefits as long as it remains in play
Card not found, on the other hand, is the basis for a deck in Modern (its namesake actually) and played in Legacy Storm decks (maybe Vintage as well, I dont know the format enough to say)
Love her, but she's broken in multiplayer and Commander once down with that final ability killing multiple stuff across multiple players and such
This means that every single creature in your deck works with Prosperous Thief, Ingenious Infiltrator, Yuriko, the Tiger's Shadow, and Kaito, Bane of Nightmares, which is a pretty significant power-boost to the non-ninja creatures in your deck
While it is the most fun and explosive thing our deck can do, we can also just power our a Torgaar, Famine Incarnate on Turn 3, follow it up with Rekindling Phoenix on Turn 4, and go with the beatdown plan, which makes Torgaar's Rite more of a solid midrange deck that can also just combo kill opponents on Turn 3 when things go right, which seems like a solid place to be in Historic