Elemental Body IV (Earth)

You become a huge earth elemental. You gain a +8 size bonus to your Strength, a –2 penalty to your Dexterity, a +4 size bonus to your Constitution, a +6 natural armor bonus, and a +1 bonus to your attack, damage rolls, and combat maneuvers. You also gain two 2d8 slam attacks, resist acid 20, and vulnerability to electricity. You are immune to critical hits and sneak attacks while in elemental form and gain DR 5/—. Your movement speed is reduced by 10 feet.