Inspiration Magic

Inspiration Magic is a Mesmer secondary attribute meaning that any character with a Mesmer for their primary or secondary class can put points into this attribute.

Guild Wars Description
"No inherent effect. Many Mesmer skills, especially spells which generate energy and reduce damage, become more effective with higher Inspiration Magic."

General Description
Inspiration Magic is a very important skill for Mesmers. Whereas Domination Magic is focuses on disrupting foes and dealing damage, Inspiration Magic is focused on disrupting foes and healing either the Mesmer's health or energy, or simply protecting and healing the Mesmer in various ways.

A good example of the similarities and differences between Domination and Inspiration Magic is the Domination skill Shatter Enchantment and the Inspiration skill Drain Enchantment. Shatter Enchantment removes an enchantment and deals damage to the target foe, and Drain Enchantment removes an enchantment from target foe and the caster receives energy.

All in all, Inspiration Magic can be a very powerful attribute, but due to its lack of many skills that actually deal damage, you will be forced to utilize other attributes. Inspiration Magic is best suited as a support attribute, keeping the Mesmer alive while other attribute's skills deal the damage.