Pillar Analysis: Unique Effect (Reanimation), Scarcity (P3K), Collector Demand (Dragons)
In WotCs case, they made an official statement that there would be no reprints of the cards on the reserved list
Other creatures that could be useful here are Crashing Drawbridge to give your newly cast tapping creatures haste
Another typal highlight is Bloodline Bidding, an eight-cost black sorcery with convoke (creatures can tap to help you pay the cost), it returns all creature cards of the chosen type in your graveyard to the battlefield
So, they're free to attack on your turn and then adopt a defensive position, returning to artifacts on your opponents' turns.
Remember to make sure the event rewards are Gems too - before purchasing entry you can review the potential prizes across the bottom of the screen