For players seeking specific cards, buying singles is more cost-effective
He is great in ramp decks where he gets Mana Vault, Voltaic Key, Mana Crypt and of course lands and he is great in combo decks where he gets Lions Eye Diamond, Pyrite Spellbomb, Chromatic Star and many of the previously mentioned cards too
Rather than just being a completely linear me, you, me, you, etc
The Lost Caverns if Ixalan is less about creature types and more about exploration
Awaken the Woods is a card that costs X and two Green mana, and tells us that we no longer have to choose between the two
This gives you a lot more control over the course of other players turns than you may normally have and is a great card to use in conjunction with threaten effects (that's to say, cards that let you steal your opponent's cards until end of turn) like Act of Treason