The reason is that Maverick is the only deck that this really can fit into, as its the only deck that can easily search for this land while protecting its 4-power creature so this land can be activated multiple times a game
Andril, Narsil Reforged Aragorn, Hornburg Hero Legolas's Quick Reflexes Gimli's Reckless Might Isengard Unleashed Rohirrim Chargers #2
(Each in the mana costs of permanents you control counts toward your devotion to white.) Whenever another creature you control enters or dies, you gain 1 life
Adventure cards allow for more options from the same number of cards
A total of 572 Magic: The Gathering cards are on the Reserve List, a list created by Wizards of the Coast that prevents reprints of specific cards from 18 early sets
What we really want to avoid is another card like True-Name Nemesis , which is both unfun in one-on-one play and becomes extremely popular in the format