Sapphire's Favored Construct

Emerald Gyre, 7th Level
N Large Construct
Init +1; Senses Darkvision 60 ft., low-light vision; Listen +0, Spot +0
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AC 27, touch 10, flat-footed 26
hp 101+2d6 (13 HD); DR 10/magic
fort +4, ref +5, will +4
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Speed 40 ft. (8 squares)
Melee 2 slams +20 (1d8+12)
Space 10ft., Reach 10 ft.
Base Atk +11, Grp +25
Atk Options improved grab, trip, pounce, rend 2d6+18
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Abilities Str 35, Dex 13, Con --, Int --, Wis 11, Cha 11
SQ construct traits, natural ivisibility
Feats --
Skills Listen +0, Spot +0
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Improved Grab (Ex): An emerald gyre has the improved grab ability. To use this ability, the construct must hit an opponent smaller than itself with its slam attack. It can then attempt to start a grapple as a free action without provoking an attack of opportunity.
Trip (Ex): If an emerald gyre hits with a slam or claw attack, it can attempt to trip the opponent as a free action without making a touch attack or provoking attacks of opportunity. If the attempt fails, the opponent cannot react to trip the emerald gyre.
Pounce (Ex): An emerald gyre of at least 7th level can make a full attack if it charges a foe.
Natural Invisibility (Su): The astral construct is constantly invisible, even when attacking. This ability is inherent and not subject to the invisibility purge spell.
Rend (Ex): The astral construct makes claw attacks instead of slam attacks (it deals the same amount of damage as it would with its slam damage, but does slashing damage instead of bludgeoning damage). An astral construct that hits the same opponent with two claw attacks in the same round rends its foe, which deals extra damage equal to 2d6 + 1-1/2 times its Str modifier.