The negative bloodlines are part of a game mode that is achieved by letting the Dark Knight kill you in the first scene where you learn to block then saving, whilst doing this might take a while because it keeps stopping the game to explain the block, and that he only hits 44 damage on his highest hit. As well as a special achievement, you get a "dark" version of each of the Omega Set. (Caution: All of this equipment cannot be unequipped until you beat bloodline -10. This, of course, means that you can't equip the Infinity Blade, and therefore you cannot beat the game). Each of these items have a massive attack bonus and the sword is the one of the most powerful swords in the game. You can level up and gain money a lot faster, and when that is done you can restart from bloodline one and start again with all the money and items you bought, except for the "Dark" equipment.
- Getting the Infinity Blade as quickly as possible significantly increases the player's odds of survival.