You make a melee spell attack against your target, freezing them internally.
If a creature dies this way they are petrified in solid ice. If a creature is broken while in this state, they slowly thaw, but suffers the trauma of whatever injuries it suffered while frozen.
You touch your target; an icy chill seeps into them, freezing them from the inside out. If they die, they stand encased in solid ice, a fragile statue awaiting its fate.