This hero and guide are great for people playing with friends, its an easy way to allow your teammates to farm. This guide is made for people who want to support their team to victory by buying wards, ganking other lanes to keep carrys down, and making sure that your carry is getting all the farm he needs. This guide is not made for people who want to play selfish and get kills or farm in a lane as much as they can to look super-good with maxed items, chances are if you follow this build you wont see yourself 13-3-2 but instead 4-2-15.
This build will guide you through what is probably known as the best way to play CM, as a support *****.
Crystal Maiden is probably one of the best support heroes in Dota, if not the best.