Okay, here's another draft;
Magestone Golem
(Living Construct Type)
Huge Size
Str:43
Dex:16
Con:30
Int:19
Wis:15
Cha:16
15Ft Space/Reach
40ft. Land Speed.
AC:31(10+Dex Mod-Size Mod+21 Natural)
DR:10/Magic, Adamantine
Spell Resistance 25
HP:310(20HD)
BAB:+15, Grapple:+40
Usually Neutral
Speaks Common, Celestial, Infernal, Abyssal, and Draconic.
Atk:Slam:4d6+24?
Full Attack:3 Slams, 4d6+24
Feats:Imp. Unarmed Strike, Imp. Natural Strike, Power Attack, Leap Attack, Close Quarters Fighting, Crush, Quicken SLA(Slow)
Rocket Punch(Su) :A Magestone Golem's Slam Attacks are treated as having the Throwing, Returning, and Collision properties. They are treated as magic weapons for the purpose of overcoming damage reduction. A Mage Stone Golem can make iterative attacks with this ability due to it's base attack bonus.
Perpetual Shifting(Su) :A Magestone golems disconnected pieces are in constant motion. This gives the Magestone Golem Light Fortification. Additionally, all projectiles, and ranged spells that specifically target the Magestone Golem have a 25% miss chance. Area spells are exempt. If a spell fails to overcome the miss chance, it continues moving to through the Magestone Golem, not affecting it, to it's maximum range, affecting anything that would be subject to it's new area of effect and effects.
Earth Shatter(EX) :If a Magestone Golem falls from any height of at least 10 feet, it causes a shockwave a number of feet in diameter equal to the distance it fell. Everything caught in the shockwave take 1d6 points of damage, plus an additional 1d6 points of damage for each 20ft the Magestone Golem fell, reflex half. Anything that fails it's reflex is not knocked prone. All terrain in the affected area is now considered rubble, and halves all movement on it's surface.
Magic Life Force(Su) :If a Magestone Golem is in the area of an Antimagic Field, it is considered unconcious. However, when attempting an Antimagic Field in an area with a Magestone Golem, you must succeed on an opposed caster level check.
SLAs:Levitate/At will, Stone Wall/3 per day, Slow(Quickened)/3day, Earthquake/1 per day.
Alignment: Usually Neutral
Environment: Any
CR:18.