This set includes 20 different Alt-Art cards, 13 featuring Royal Knights with special designs unlike standard Alt-Art cards
The trick is to have enough nonland permanents on board that you can recoup the cost immediately, then untap with triple mana, or close to it
The Aetherdrift Gearhulks are ally-colored gold cards, each with CCDD colors in their mana costs
You wouldn't get results from any other die (in this set, anyway)
While Ancient Rules is a decent option for its specific purpose, a more versatile and popular alternative would be Monster Reborn, which can revive any monster from the graveyard rather than just from the hand
2014-05-29 If you use Whispergear Sneak during the first draft round to look at an unopened booster pack, the owner of that booster pack doesn't have to "open" that booster pack for the next draft round, although they may do so