Avaricious Dragon: great Dragon, should have been in Dragons of Tarkir (there is a set that needs more playable dragons, and I am not kidding, so many unplayable crap dragons in that set)
The thing that sets this commander apart from other prospective commanders for a vehicle deck is that he actually doesnt need you to run a single vehicle in order for him to do his thing
Besides the above mentioned Black Rose Dragon, you can use Black Rose Moonlight Dragon and Cyberse Quantum Dragon who return the opponents monster to the hand with their effects, or you can choose PSY-Framelord Zeta who can similarly banish itself, but whichever Synchro Monster you Synchro Summon I think will be quite fun to use
Goblins dont get attacked
however, the five non-Saga The Brothers' War Commander cards from Set Boosters, plus the two mythic rares from Set Boosters and the mythic rare legendary cards from The Brothers' War Commander decks do appear in foil in Collector Boosters