Each Collector Booster contains 15 Magic: The Gathering cards and 1 Traditional Foil double-sided token, with a combination of 57 cards of rarity Rare or higher and 35 Uncommon, 36 Common, and 1 Land cards
Also Dragon's Hoard just really fits the flavor of a dragon deck, and has the bonus ability to draw some extra cards
In fact, for the first time, there were serious reasons to mill yourself
So you can use that ability on Esper Terra itself, and then as you put three lore counters on the saga, you get three more copies of the ability
Used wisely, you can deal decent damage and control the board with the right timing
Introduced in the Murders at Karlov Manor expansion (MKM), the surveil lands are a cycle of lands that allow you to surveil 1 when they enter the battlefield