Shiva is one of the Assassin's on the Most Wanted list. After playing through the story, go to the Gotham Merchants bank in "The Bowery" district. The starting point of Shiva's quest is not marked on the map. Listen for a crying baby, and inspect the abandoned baby stroller in front of the Gotham bank to begin this quest. You will then have to complete a series of tasks for Shiva. It does not matter if her ninjas or other enemies hit you while doing the tasks. After completing all the tasks, meet up with her in Sheldon Park (marked on your map). Successfully complete the fight with her without taking any damage to get the "Flawless Display" achievement. A good tactic to use to not get hit is to jump, hit an enemy once, and jump again. When jumping, the enemies will not have an opportunity to hit you. During the final phase of the fight, activate your Shock Gloves to defeat the enemies more quickly. If you get hit during the fight, pause the game, and choose the "Restart" option. The entire fight will start from the beginning, and you can try again. Note: It is possible to miss the Shiva fight in the story. If you miss the fight, you must start a new game and do Shiva's side quest to fight her.