The Ratkin can disappear into the Umbra and instantly reappear behind hisopponent. The wererat then attacks his victim from behind, gleefully exploiting the benefit of surprise. Knife-Skulkers have no qualms against using this Gift to fulfill an assassination contract.
No roll is necessary, but the character must spend one Gnosis and one Rage. This Umbral 'leap' can be up to 50 feet, as long as the victim is within line-of-sight. If the Ratkin chooses to immediately attack, the strike is rolled at a -2 difficulty; the difficulty cannot be reduced below 4- Thisatcack cannot be dodged unless the victim is using Danger Sense, Evasion, Persecution Complex orasimilar supernatural ability.