This Corki build gives sustain, burst and consistent damage and light durability, making him a huge threat. Elder lizard gives his extra damage auto's even more extra damage, The Black Cleaver boosts his E perfectly, Trinity Force with ult spam does insane burst, The BloodThirster for added damage, and Zephyr for attack speed, light damage, movement speed and tenacity makes you incredibly slippery. If you absolutely need tankiness drop Zephyr for Guardian Angel or Warmogs.