 Additionally, the player can infuse a weapon with Blood Points to improve its effectiveness and possibly unlock a special attack called a "latent ability".Latent abilities function like spells in that they cost Blood Points to use and add various effects to the damage dealt by the weapon.At the conclusion of each battle the game evaluates the player's performance and assigns a letter grade-based rank, which determines the value of bonus items and the amounts of money and experience points the player is awarded.