By S. M. Agle (agles@mindnet.org)
System: For most applications, such as the aforementioned quest for the powder room, no roll is needed. For other situations, when actively looking for something hidden, a roll of Perception + Awareness is called for. Yes, yes, Awareness is a mage thing, but Alertness isn't warranted in this case. The kindred is opening herself to her surroundings, feeling as much as looking. In all likelihood, this will mean she will have to pick up the talent after she gains Lay of the Land. Note also that the effective range of Lay of the Land is subject to the whim of the Storyteller. A good guideline is forty or fifty meters in wilderness, three or stories indoors, or up to a hundred meters in tunnels. Generally assume that the more area the power has to cover, the shorter the range.
System: Roll Manipulation + Occult vs. the spirit's willpower, each success is one day the spirit will remain banished.
System: The kindred spends one blood point to become someone's double. Only the kindred changes, not their clothing. The form taken is that of the subject at the time the sample was taken, so if a child is fed upon at age eight, even if she lives to eighty, the kindred can only mimic her as a child. If a new sample of the same mortal is taken, it overwrites the older sample. The transformation lasts until A) another blood point is spent to revert to a new form or the original, or B) the kindred loses consciousness, in which case she reverts to normal automatically; daytime sleep qualifies, so if impersonation is an absolute priority, cancel the sleepovers. No roll is needed, just a sample of blood, and only a sip is required, not even a whole blood point. (Word of advice: This one is fun when paired with Theft of Vitae. Also lotsa fun for the Malkavians out there with multiple personalities.) Final word: The impersonation is perfect, and that will include certain physical merits. Enchanting Voice for example, or Acute Hearing. On the other hand, it would also confer certain flaws, such as Blind or One Arm. Non-human forms, such as garou in Glabro form or a Gargoyle are possible, but the Glabro's claws will not inflict aggravated damage unless Wolf Claws are used, and the kindred will have to learn the Flight skill to make use of the Gargoyle's wings. (Calculate flight speed as per Viceratika, using the Gargoyle's rating or the shapeshifter's Protean rating, whichever is lower.)
Really really final note: Caution, Diablerists! Yes, you can use Doppelganger to become your diablerie victim; the danger is that you might er, well, become your victim. You have how many black veins in your aura? There is a certain resonance between soul and body. Even a piece of someone else's soul in her own body may be able to overwhelm you.