Now Arthur wanting to be a Moa bird is as he would say Awesome. However, if he wanted to be even more impressive and scary,, instead of a Moa bird, he should become a terror bird. Heck even the name is terrifying. Saber tooth tigers were afraid of it thats how awesome it was.

Here is a you tube video about it.

http://www.youtube.com/watch?v=F1FD0HVUO10