Diablo is already fetching a high price, and that most likely is due to the hype it is getting from players
Any "as [this creature] enters the battlefield" or "[this creature] enters the battlefield with" abilities of the new token will work
Still, there are better non-Vehicles eligible as commanders that do similar things
There is not much that can block a big Deaths Shadow, however, many of the common removal spells of the format can take care of it, until Lurrus Deaths Shadow and the namesake deck are emblematic for how Magic is played today, interrupt your opponent, play a cheap strong threat and counter whatever your opponent tries to play against you
Your best results come from duplicating cards like All That Glitters and Thran Power Suit that stack incredibly well because they count all those copies youre making
Lifegain-to-cards: Well of Lost Dreams, Dawn of Hope, Cut a Deal, Into the Story