Bloodbones is a Soul of Rebirth enemy from Final Fantasy II. While the palette swaps of these skeletal fiends share names with the Ghost family from the first Final Fantasy (as if they're the same but with different garbs), the Bloodbones were a Skeleton recolor in said game. They are rather dangerous enemies, as they can Drain HP and deal a high amount of damage at the same time with their physicals. It is highly recommended to defeat them quickly, if possible. If they are not in the front rows, it is best to focus on any other dangerous enemies such as Mini Satanas with spells. Using Fire equipment or spells, such as Flame Lance and Flame Sword, as well as high level Fire spells (level 5 or higher) are more than enough to deal with these enemies.