Mox Sapphire doesn't do anything more than provide a single blue mana, but the fact you could play as many of these artifacts as you wished on the first turn meant it was theoretically possible to have far more mana than your opponent if you received a lucky draw
These cards let you pay and sacrifice them to draw a card
Get your swing and copy on
For example in this deck, with all the deck build around Doran, the Siege Tower that supports both Treefolk tribal and Toughness Tribal theme , the true power of the deck lies in synergy and that is not reflected in statistics
Counter spells to remove the treat before it ever has a chance to resolve Artifact removal: Vandalblast, Gemrazer, Abrade, Disenchant, etc
Check out Porphyry Nodes if you want a more affordable equivalent