Entombed (called Mummies in the Japanese versions) are reanimated corpses, taking on the appearance of zombies. They are not fast, but their talons rend flesh with ease. They are the promoted versions of Revenants. As with Revenants, they wield a somewhat varied assortment of weapons: Rotten Claw (which few non-boss versions use), Fetid Claw (commonly used), and the Lethal Talon (rarely used). They have a much elevated HP stat compared to the Revenants, as well as luck, which explains why most characters have a 0 critical rate when attacking one, but their defense, resistance, and skill remain at low levels.
Entombed are rarely seen, as there is usually one or two of them (or none). However, they give a huge surge of XP (depending on the unit), ranging from 20 to one complete level.
Boss versions of Entombed in The Sacred Stones have low Luck and lower Health, and non-boss versions have higher Luck and Health than the boss version. It is unknown how this occurs, and may have been an oversight.