It not only replaces itself and can take out a creature thanks to deathtouch, it's also an evasive flier and an artifact creature, meaning it has plenty of synergies to work with
Plus, lots of decks actually abuse them, by tapping a Howling Mine to turn it off, using a card like Fate Unraveler
And since its uncounterable spot removal mode pops it into the graveyard, it also helps to fuel the deck's graveyard strategies, synergizing with mechanics like Harmonize and Collect Evidence
Now that our spotlight series has moved through the first eight sets of this block ( Sun & Moon base, Guardians Rising, Burning Shadows, Crimson Invasion, Ultra Prism, Shining Legends, Forbidden Light , and Celestial Storm ), now it's time to look at the next set from this era: Dragon Majesty was released on September 7th, 2018 which is less than a month after Sun & Moon Celestial Storm