Class Skills: A spirit guide gains all Knowledge skills as class skills. This replaces the bonus class skills gained from the oracle’s mystery.
Voice of the Grave (Su): You can speak with dead, as per the spell, for a number of rounds per day equal to your oracle level. These rounds do not need to be consecutive. At 5th level, and every five levels thereafter, the dead creature takes a cumulative –2 penalty on its Will save to resist this effect.
Lich
Source PZO9297
Every living spellcaster hides a secret in their flesh—a unique, personalized set of conditions that, when all are fulfilled in the correct order, can trigger the transformation into a lich. Normally, one must expend years and tens of thousands of gold pieces to research this deeply personalized method of attaining immortality. Yet, in a rare few cases, chance and ill fortune can conspire against an unsuspecting spellcaster.
EFFECT
You have (unknowingly) fulfilled most (but not all) of the ritualistic components to achieve lichdom. You have yet to turn into an undead creature, but you are close. You take damage from positive energy and heal from negative energy as if you were undead.
At 5th level, add control undead to your list of 2nd-level oracle spells known
At 10th level, add undead anatomy I to your list of 3rd-level oracle spells known and undead anatomy II to your list of 5th-level oracle spells known
At 15th level, you are immune to death effects.