Understanding rarity and production is a huge step, but it's just one piece of the puzzle
When this creature leaves the battlefield, return the exiled card to the battlefield under its owner's control
For formats with fast aggro decks, it might be better to play a Branchloft Pathway on turn one to make your Noble Hierarch, or as Boulderloft Pathway sometimes setting up your Collected Company
While The Brothers' War meld cards still run the risk of having a part of the meld pair removed in response to the meld effect, most of the cards doing something pretty much as soon as they meld is a big improvement on the original cards
This angle creates pressure in stalled boards and mirrors a play pattern more commonly associated with the best angel commanders in MTG, where aerial dominance decides games
Living metal (As long as it's your turn, this Vehicle is also a creature.) Whenever another creature or Vehicle enters the battlefield under your control, put a +1/+1 counter on Prowl