DENSITY ALTERATION | Su

This extraordinary mutant ability grants you the ability to enlarge or reduce your size while maintaining the same mass.  You must choose the ability to enlarge or reduce when this mutation is selected.  Density alteration is considered a standard action.

Enlarge: Density alteration doubles your height. This increase changes your size category to the next larger one. You gain a +2 size bonus to Strength, a -2 size penalty to Dexterity (to a minimum of 1), and a -1 penalty on attack rolls and AC due to its increased size. If your size increases to Large you have a space of 10 feet and a natural reach of 10 feet.  Enlarging does not affect your speed. If insufficient room is available for the desired growth, you attain the maximum possible size and may make a Strength check (using its increased Strength) to burst any enclosures or clothing in the process. If it fails, you are constrained without harm by the materials enclosing you.  Your armor and equipment do not expand with you with the exception of augmentations.  Since you gain no weight you gain a +4 on Athletic skill checks to swim due to lower body density.

Reduce: Density alteration causes instant diminution of your body, halving your height, length, and width. This decrease changes your size category to the next smaller one.  You gain a +2 size bonus to Dexterity, a -2 size penalty to Strength (to a minimum of 1), and a +1 bonus on attack rolls and AC due to your reduced size. A Small humanoid creature whose size decreases to Tiny has a space of 2-1/2 feet and a natural reach of 0 feet (meaning that it must enter an opponent’s square to attack). A Large humanoid creature whose size decreases to Medium has a space of 5 feet and a natural reach of 5 feet. A reduction in size does not alter your speed. Any armor and equipment carried by you does not shrink with you unless its an augmentation.

Evolution I:  Your mutation allows you to enlarge or reduce your size.

Evolution II:  Your mutation allows you to alter your density as a swift action.