Ice crush

Primary Action and Move action. Provokes. Target one 5'x5' square. Range 10. Concentration for 3 rounds then permanent. Ice blossoms in a square, expanding and folding filling the square in your round. The following round it expands out 1 square (5') in six cardinal directions, then the last round fills out the adjacent squares. This pushes any targets in the area to the adjacent squares. Anyone that does not have an adjacent square to move to and an unmovable surface around them suffers 4D6 crush damage and D6 energy (cold) damage, and must make an SDF check or be immobilized. The ice is brittle but tough- for each hit over 10HP damage a single block worsens in condition. Fire attacks count towards the brittle factor.