Yes, the cards you draw will always be lands and yes, no matter how well you shuffle your deck after, you draw another land way too often because variance hates you
Well start with Evolving Wilds and friends, which are go-to budget lands that get the job done, but slowly
Then, when an enchanted creature you control deals combat damage to a player, you get to draw a card
Whether you pop a different Legendary Creature in your command zone or repurpose your cards into a totally custom deck, the set provides enough versatility to have each round go a little differently every time
You could have just called them "Biblioplex" and "World Tree." Anyways, no flavor issues here
There's such a wide range of spells that count towards cascade with this elder dragon, that you'll develop a refined taste to enjoy solving for the unknowns