Perhaps the clearest format summary Ive found so far was for a different Hall of Fame format, New Hall of Fame. Seeing those deck lists ranked was certainly nice, but this format seems to be much looser on its points restriction system
This is the most anyone has paid for a Black Lotus card, with a recent auction in 2019 ending with a sale of over $150,000
This makes them less ideal for frequent reprints, as they are more suited to special releases like the current Horizons set or Secret Lairs
Palace Sentinels is a 2/4 Human Soldier which costs three generic and one White mana to cast
It's worth mentioning that, given the game's rules, players cannot declare an Item target for Belle - Apprentice Inventor and then banish it for its own effects, such as the healing ability from Pawpsicle
It provides mana and card advantage, making its serialized version a proper chase card with listings at $1,000