Lingering Poison

This is a Rogue Talent — a class feature gained through that class's own talent choices, not a feat you pick through normal feat selection.

(Ex) When she delivers a contact or injury poison, instead of the poison’s normal onset time, the rogue can delay the poison’s effects until up to 1 day from when it is delivered (minimum 1 round). The delayed poison can be detected as normal by spells such as detect poison and similar abilities.