While it is true that a few of these cards have now been Masterpieces twice (Mana Vault, Ancient Tomb, Through the Breach), we need only look as far as Mana Crypt and Sol Ring for examples of cards that have had multiple rare and shiny versions that have tended to trend upward together once the Masterpiece started to rise
This adds lots of value to all your spells and gives you a lot of cards to play with
Its mostly going to be played in equipment Voltron decks but requires your creature to die to get value out of it
Thats due to both the cards use as a Commander and its rarity, especially in that classic late 90s FF7 art style
Basic Lands Players need basic lands to build their decks
With this system in mind, Animated Army certainly isn't lacking in Enchantment and Artifact cards over a quarter of the deck is dedicated to these spells that'll not only buff your existing board state but also provide you with extra fire power when you're on the offensive