The whole point of Vapor Snag is to just undo the work youve done, even at the cost of a card
I was already a Return to the Ranks apologist (playing it quite extensively in early builds of Winota), but Raise the Past is just a far better rate, allowing you to bring back many more creatures for just four mana
any reprinted cards are, of course, still legal in the formats they were last legal in
Kaalia of the Vast can cheat it from your hand (since it's a dragon), Yuna, Hope of Spira can bring it back from your graveyard (since it's an enchantment), and Esper Terra can copy it and trigger most of Bahamut's value by advancing three chapters: Summon: Bahamut isnt legendary, so Esper Terra has no problem copying it
Once a player has announced that they are casting Cavern-Hoard Dragon, no player may take actions to try and change the greatest number of artifacts an opponent controls before Cavern-Hoard Dragon's cost is locked in
However, getting to dig for a hasty attacker as part of doing so, increasing the potency of your attack