free mmo / mmorpg: "Wizard 101"

Wizard 101 is a card based MMORPG with a story similar to Harry Potter. You are a young wizard being trained in the ways of magic at the Ravenwood School of Magical Arts under the watchful eye of your headmaster. As you learn to harness mystical powers, you'll be tasked with saving the school from the evil wizard Malistaire Drake.