BOZ
Creature Cataloguer
fair enough. 
as for why a lizard is a chilly willy, I can’t explain that one (no biology major here), but Shade did come up with a neat little thing I’m probably going to use:
Arctic Adaptation (Ex): An alcor does not need to make Fortitude saves to avoid taking nonlethal damage in conditions between 40 degrees and -20 degrees. In conditions of extreme cold (below -20 degrees) they must Fortitude saves like any other creature, but gain a +4 racial bonus on this save.
i like the tail sweep/trip idea, and rewrote it ever-so-slightly:
Tail Sweep (Ex): This special attack allows an alcor to sweep with its tail as a standard action. The sweep affects a half-circle with a radius of 5 feet, extending from an intersection on the edge of the alcor’s space in any direction. Creatures within the swept area are affected if they are Large or smaller. A tail sweep allows for a Trip Attack without provoking an attack of opportunity. Rather than making an opposed Strength check, any affected creatures can attempt a Reflex save to avoid the Trip (DC 11). Successfully avoiding the Trip does not allow for the opponent to make a Trip Attack of their own.
changed this a little too:
Downhill Charge (Ex): When an alcor makes a charge while skiing downhill, its attack deals double damage in addition to the normal benefits and hazards of a charge.
and how about this?
Skiing (Ex): By balancing itself on its large, flat tail, the alcor can glide rapidly across snow and ice while moving downhill. It can move as a run (x4) on slight grades (less than 45 degrees) or as a run (x5) on severe grades (45 degrees or more).

as for why a lizard is a chilly willy, I can’t explain that one (no biology major here), but Shade did come up with a neat little thing I’m probably going to use:
Arctic Adaptation (Ex): An alcor does not need to make Fortitude saves to avoid taking nonlethal damage in conditions between 40 degrees and -20 degrees. In conditions of extreme cold (below -20 degrees) they must Fortitude saves like any other creature, but gain a +4 racial bonus on this save.
i like the tail sweep/trip idea, and rewrote it ever-so-slightly:
Tail Sweep (Ex): This special attack allows an alcor to sweep with its tail as a standard action. The sweep affects a half-circle with a radius of 5 feet, extending from an intersection on the edge of the alcor’s space in any direction. Creatures within the swept area are affected if they are Large or smaller. A tail sweep allows for a Trip Attack without provoking an attack of opportunity. Rather than making an opposed Strength check, any affected creatures can attempt a Reflex save to avoid the Trip (DC 11). Successfully avoiding the Trip does not allow for the opponent to make a Trip Attack of their own.
changed this a little too:
Downhill Charge (Ex): When an alcor makes a charge while skiing downhill, its attack deals double damage in addition to the normal benefits and hazards of a charge.
and how about this?
Skiing (Ex): By balancing itself on its large, flat tail, the alcor can glide rapidly across snow and ice while moving downhill. It can move as a run (x4) on slight grades (less than 45 degrees) or as a run (x5) on severe grades (45 degrees or more).