Empathy is a very old magical order, but a waning one. There are few formal schools left and a stigma around the practise has arisen. There are many magical practises that may be referred to as Empathy, but this refers to the discipline of Empathy and all those teachings once formally known as Sympathomantic abilities.
Empathy allows a mage to draw emotions from close by sentient creatures. These emotions can be saved up and use to create magical effects. It is an order very much focused on balance and careful application of magic.