How to Unlock Vampire Slayer Ezekiel To unlock Vampire Slayer Ezekiel, you must reach Chapter 5 of the Adventure Codex: A Sacred Pledge of Blood. You must then reach and complete the Pledge Loop Codex Entry, near the bottom of the Chapter 5 Adventure Codex. Progress the Adventure Story to Chapter 5: A Sacred Pledge of Blood Reach the Pledge Loop Codex by progressing through Chapter 5 Go to the Temple of Sylaveth with the guidance of the Guardian's Pledge Examine the Energy-Infused items Defeat Vampire Leonardas Complete this part of the main questline to unlock Vampire Slayer Ezekiel.