Well that's how things become cold - if you pick up snow in your hand, the snow absorbs heat from your hand through thermodynamics laws regarding temperature equalization. The snow becomes hotter, and your hand becomes cooler. Heat is not created or destroyed.Aardvaarkman said:I'm not sure that's true (for a completely made-up thing) - couldn't the energy to create a stream of cold matter have come from the caster? The cold matter would absorb the heat of the target. A fire ring also assumes there's enough energy to be drained from the victim to cause such an effect.Thanatos2k said:Well no, the target is the thing being cooled. The heat is not coming from the caster himself, but being extracted from the target, causing the icy effect.
Real-world example - if you throw a snowball at someone, it doesn't cause things in the vicinity of the target to heat up. If anything, they get colder and wetter due to the "splash effect" of the snowball.
If someone casts an ice spell - that means the environment directly around the target and/or the target itself becomes cooler, so the heat removed from the target or environment to generate that effect had to go somewhere.