Elemental Body III (Earth)

You become a Large earth elemental. You gain a +6 size bonus to your Strength, a –2 penalty to your Dexterity, a +2 size bonus to your Constitution, a +6 form natural armor bonus to AC, and a +1 bonus to your attack, damage rolls, and combat maneuvers. You also gain two 2d6 slam attacks, resist acid 20, and vulnerability to electricity. You are immune to critical hits and sneak attacks while in elemental form. Your movement speed is reduced by 10 feet.