Prerequisites: Hit where it hurts, 10th-level genius.
This functions exactly as the assassin ability by the same name, except that the genius may make use of it only while concentrating. The genius must remain concentrating for all 3 rounds of studying and while actually conducting the sneak attack, effectively using at least 4 rounds of concentration. Treat the genius's effective assassin level as 1/2 her genius level for the purposes of determining the DC of this ability. If the genius has levels in another class that grants the death attack ability, these levels stack with her effective assassin level to determine the DC of her death attack.