Your time spent plumbing the depths of magic knowledge has resulted in a treasure trove of obscure facts.
Prerequisite: Exposure to Legend Lore or Vision spell.
Benefit: All Knowledge checks you make are treated as trained checks, even if you don't have any ranks in the specific skill. If you have at least one rank in the specific Knowledge skill in question, you gain a +1 bonus on the check.
Source: Unearthed Arcana