If a Clone says it enters as a copy of any creature on the battlefield, you simply choose a creature without targeting it, which lets you copy creatures with hexproof, shroud, or ward with no issues
If it attacks, it will deal combat damage equal to its power, either to whatever blocks it or to a player directly
These online code cards contain a random assortment of Pokmon, Trainer, and Energy cards
The proxy is a substitute for an immediately available card
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
I only got to G and thought maybe I'd just stop there, but then I realized, "Right, pattern completion