Your core build is Kage's Lucky Pick, Sorcerer's Shoes, Rod of Ages, and Rylai's Scepter. Depending on whether the enemy team is AD or AP will determine whether to get Abyssal Scepter or Zhonya's Hourglass. Though if the game looks like it will end soon, get deathfire grasp, it can help you clinch an extra kill or two before the match ends.