You can use this device to summon the astral projection [13] of a recently killed superbeing and fight it. But be careful: astral projections are much more powerful than the originals!
>The device must be used right after you kill an appropriate superbeing in its lair next to its carcass. >Monsters summoned by the magic of Conlegret Pack of Cards, Clan Totem, or by other means, are not suitable for Astral Hunt. >You will have only one attempt at killing the projection per instance. >Other group members can join the fight against a summoned astral projection (even if they did not take part in killing the original superbeing). >Astral projections do not count as superbeings.