Instructions
Log in to your Facebook account and select the "Vampire Wars" logo to start the game.
Select the "Free Gifts" tab on the left side of the screen. Scroll through the free gifts and select "Bloodletting."
Select a Facebook friend who is also playing "Vampire Wars" and click "Send" to give that friend the Bloodletting ability. You can also send a message along with the gift, so ask your friend to send you the Bloodletting ability. Exit out of the game.
Check the "Vampire Wars" notifications on the left side of your Facebook home page. Select "Bloodletting" after your friend has sent you the gift, and then select "Accept." You will now have the Bloodletting ability.