Protection is also useful
Chatterfang has forestwalk, so its going to get through unblocked on quite a few decks, meaning there are some great Voltron possibilities
For example, the Lord of the Rings starter kit retailed for around $25, while a typical Starter Kit will sell for around $20
If you can copy it, it kind of becomes worth the mana investment, except you could just play a card that was worth what you're paying in the first place, and copy that
This could be your classic Counterspell or something as exotic as Avoid Fate
Which Deck to build: After the first week of playing and you have unlocked all the standard and you are either a veteran looking for what to play or you are by now a more experienced beginner and looking for the first deck to build and start grinding