Source: Book of Spirits p139
This Numen allows the spirit to lock a target in a crushing embrace. The Numen functions like any brawling attack. If in the physical world, the spirit must be Materialized to affect a material target; otherwise, this Numen can only be used on other spirits in Twilight. The spirit may roll Power + Finesse when grappling instead of Power alone. (This takes the place of any Strength + Brawl rolls; see the World of Darkness Rulebook, p. 157). If the spirit spends one point of Essence, the spirit’s grappling attacks inflict lethal instead of bashing damage for the rest of the scene.