I just found out this weekend that Crowns Of Power is back. It's also 100% free.
What is Crowns Of Power? It's an old little-known MMORPG from a tiny handful of developers that blended the traditional MMORPG with Magic: The Gathering from years ago (not the more recent versions of it which are focused on creatures). There are no "classes", instead you choose two of the colors. You start with one color and add a second at level 10.
It shut down years ago but was bought and relaunched I think two years ago. It's old but fun.
The colors follow classic MTG pretty faithfully in concept. Red is damage, Green pets and buffs, Blue mind and crowd control, Black DPS debuffs, and life leech, White protection and healing. And there's PvP if you want.
http://www.crownsofpower.com/spell-schools.php is only a handful of spells available.
I'm currently green/black and might roll a red/white.