First, we're going to take a look at the blue and white (Azorius) Buckle Up deck, which revolves around pilots and vehicles, using the Commander Kotori, Pilot Prodigy to make every vehicle (including a very nice included Parhelion II) easy to crew and effective in combat
Responsible proxy guardrails: clear not for sanctioned events, no deception, and sane defaults
Mythic rares are the splashiest cards in any given set, the ones that generate the most buzz and that usually bring something new to the table, or that enable a special deck built around them
Then Edge of Eternities introduced Spacecraft, which need charge counters to turn into creatures and gain powerful effects
We started playing it at home, and really liked it
On the play I would almost always have a counterspell that had more potential targets even if it cost two