Knowledgeable even among stone giant elders, you have unlocked greater mastery over earth and stone.

Prerequisites: Cha 17, stone giant elder (age 700 years or older).

Benefit: In addition to the usual spell-like abilities of a stone giant elder, you gain the ability to use passwall, spike stones, statue, stoneskin, and wall of stone once per day as spell-like abilities (caster level 10th, the save DCs are Charisma-based).