Ice-Make: Diamond Cage

Ice Make: Diamond Cage is an Ice-Make Spell.

Description
User creates a diamond-sided sphere of an unmeltable ice on his enemy's body. It was stated that this spell destroys the body of the trapped person along with the ice. However, it loses its hardness the further it is away from the Caster and eventually shatters. Lyon first used this on Natsu, who failed to melt it with his fire.