Source: Dragon #313
When using your cold spells and powers, you can manipulate the molecular structure of the target, driving its temperature downward and even freezing creatures in their tracks.
Prerequisite: Any two spells with the cold descriptor, control flames.
Benefit: This feat can be applied to any spell or power with the cold descriptor. Its effects reduce the targets' mobility and make objects more susceptible to damage.
Any creature that takes cold damage from a power or spell enhanced by this feat and is in contact with a surface must attempt a Fortitude saving throw. The DC for this save equals the save DC for the spell or power (or the save DC it would otherwise have if no save is allowed). Failure means the creature is frozen to the surface and cannot move until it breaks free with a successful Strength check, which requires a full-round action. The DC of the Strength check is equal to the DC of the spell or power. Success means the creature is not immobilized but can move at only half normal speed for 1d4 rounds. Creatures that are immune to cold or that are not in contact with a surface are immune to the immobilizing effect of this feat but are still subject to the spell's or power's damage.
All objects caught in the area of a Solid Freeze effect become exceedingly brittle for a number of rounds equal to the ability modifier that applies to the spell or power used (minimum 1 round). During this time, each such object's hardness is reduced by 5 (minimum 1).
To apply Solid Freeze to a spell, the caster must expend 4 power points per spell level. To apply it to a psionic power, the manifester must spend 2 spell levels per power level.