Legendary cookies in Cookie Run: Kingdom are among some of the most powerful units in the game and extremely difficult to acquire. Using the gacha system in Cookie Run: Kingdom, players have a fraction of a percentage chance to pick up a Legendary unit, but having one on the team will boost a player's overall combat power to new levels. Thankfully for the player base, developer Devsisters are extremely generous with gifting blue crystals, which are used to perform pulls.