Screaming Mealstrom Maw
The Abyssal sucks in a great and long breath of air, and gravewind rushes into his mouth with with a shrieking noise, never to be seen again. Around him forms a Vortex (Essence x 5) yards across, dragging everyone within towards him by (Essence) yards every turn as a Knockback effect. Immaterial Beings such as Ghosts are particularly susceptible and double the Knockback.
If an Immaterial Being would normally touch the Abyssal while this Charm is active, it has to either evade, brace itself somehow, or otherwise defend. It rolls (Essence + appropriate attribute and ability), with the Abyssal's Essence as target. If it fails, it is dragged into his mouth by the howling air, likely howling alongside it, and ends up in the Abyssal's House of Eternity-provided space (or can propably just be swallowed and eaten directly, see Cold Soul Furnace).
This Charm also rips free any fresh ghosts from corpses in the area of effect, should any have yet to rise.
Obviously, for the duration of this Charm the Abyssal may not use his mouth for anything else.
Cold Soul Furnace
The Abyssal devours a ghost and burns it's Essence for sustenance. He may now regain motes by eating a ghost in the much same way that drinking someone's blood allows.
If the Abyssal also knows House of Eternity, he can also attempt to devour one of the ghosts within, provided he can stop the ghost from resisting and fleeing from his soul post-haste.