Two-for-ones of both families tend to be pillars of Limited play
If it attacks, it will deal combat damage equal to its power, either to whatever blocks it or to a player directly
I only got to G and thought maybe I'd just stop there, but then I realized, "Right, pattern completion
The proxy is a substitute for an immediately available card
These cards are hard to find and are only distributed through some of the largest and most competitive events in the world, so getting your hands on these will require some serious skills or reassessing your financial status
WotC suggests that big creatures that are hard to interact with are positive additions to their environments. They might have been thinking of the Avabruck Caretaker / Hollowhenge Huntmaster when they said that, but Im not sure anyone would agree in the case of that card