Your natural rapport with burrowing mammals improves.
Prerequisites: Gnome, Cha 13.
Benefit: You gain a +2 bonus on Handle Animal checks and wild empathy checks involving burrowing mammals. If you have the spell-like ability to speak with burrowing mammals, you can use this ability one extra time per day per point of Charisma bonus.
Normal: Gnomes can normally use speak with animals to converse with burrowing animals only once per day.
Source: Races of Stone, page 137.