Soul Possession is a special ability relating to the possessing of one's body from their soul.
Working similarly to Soul Resonance, Soul Possession instead allows the weapon to possess their Meister of choice (even by force) and take over their soul. The end result allows the weapon with Soul Possession to devour their Meister's soul.
- ↑ 1.0 1.1 1.2 Soul Eater Manga: Chapter 7
- ↑ Soul Eater Manga: Chapter 7; Tsubaki: Usually the Meister and the Weapon match their "Soul Wavelengths" and become one, right? But when it comes to the Uncanny Sword, it takes over the person's soul and controls him.