Knights of Grayfang - The land of Eldraad is boiling in the cauldron of war. Two warring factions, born of the Dark Deity, are fighting for control of the nine sacred temples. The mighty King Edval is able to bestow the power of twilight, transforming people into vampires through a mysterious ritual. But something sinister is awakening among the monsters. Tom, one of the main characters in this story, possesses an unusual blood sensor. Instead of the usual health and mana bars, this sensor reflects the level of blood in his body. This indicator can be used to activate the "Bloodthirst" ability, which unlocks new possibilities and appearance for the character. Bats, dwelling in the dark caves, can be used to enhance this ability. They can be equipped on heroes, providing passive bonuses such as disease resistance and attack enhancement.