Despite the several months between now and Disney Lorcanas official release, promotional collector sets for the trading card game are auctioning at thousands and even tens of thousands of dollars on eBay and related platforms
Spectral Adversary Imagine being attacked by a large army only to surprise your opponent by flashing in this blue creature
Two mana for a weak Impulse that puts excess cards in the graveyard is perfectly playable, and flashback gives us value in the late game if we mill this through other means
If Lightning Greaves is attached to the only creature you control, you won't be able to attach other equipment to it (or target it with anything else) until you have another creature to which you can attach Lightning Greaves
A control deck would benefit from using Arcane Denial as it provides a versatile way to counter spells while also allowing card draw for both players
Since I played during this era, I can help make sense of and create some context for those cards and well as later cards that came along that played into these sets