White creatures usually have lots of keyword abilities like flying, first strike, double strike, lifelink, or vigilance, and as such it makes sense to enhance those
Since you normally lose the game when you run out of cards in your deck, playing this card at the right time could help you make a comeback and win
The Celestus sees play partly because of the recurring looting, and hard as it is to believe, Matzalantli, the Great Door is the only free, repeatable colorless looter in the game besides Deal Broker
If you have a way to untap Dwarven Blastminer before your untap step, you can use it multiple times in a single turn
If you have many thousands of cards from across the years, it's likely you may find a couple of hits
Sol Ring only survived due to it having special privileges, despite it falling under the exact same reasoning for Mana Crypt being banned