A 3/4 vigilance creature has a ton of stats for 3 mana, and the Map tokens often mean it gets bigger
Shock and Grasp of Darkness cant remove it, and although Harnessed Lightning and Fatal Push can, both have to jump through hoops to do so
Conversely, this deck is designed to put pressure on your opponent and force them to continually clear your board, so it doesn't have any removal tool of its own
Some characters will have their own effects that only trigger when those characters are at locations, like Peter Pan, Lost Boy Leader, who will have you gain lore equal to a location's lore value the first time he moves to one each turn
For this list, Ive included cards with a strict Jeskai color identity, meaning that some dual-color or mono-color staples of popular decks, like Lightning Bolt, Lightning Helix, or Treasure Cruise, are excluded