So simple question if i'm standing on a Snow Flake can Jack still move into the square?


CREEPING FROST: During your first turn, you may place up to six Snow markers on the map. These markers can't be placed within 5 squares of another of your Snow markers or within a starting area. Jack Frost may consider squares with his Snow markers adjacent for movement purposes. When an action resolves and Jack Frost moved through a square with one of his Snow markers, remove that marker from the map.

Unless you give him some way to ignore characters during movement, no.

COLD SNAP: Give Jack Frost a double power action. He can make a ranged attack targeting one opposing character and this attack has an area of effect that includes all characters within 2 squares of the targeted character. Hit characters are dealt 2 damage and are given an action token.

Does the target have to be within range and line of fire?

It sure does. It would have to say "regardless of range or line of fire" for it do do what you think it could.

Edit: Misread