Once we've established our loop we can win numerous ways, like infinite ETB triggers from Dread Presence / Gray Merchant of Asphodel / Sunscorched Desert, or dump our infinite mana into Cut // Ribbons or Stensia Bloodhall
Typically indestructible are a little better against mass removal and the protection ones a little better against spot removal
The same set also brought us Academy Manufactor, which as long as youre making Clues, Treasures, or Food tokens you then get one of each, which can do some very silly things by making extra tokens
You could honestly make a deathtouch deck with either of them at the front and the other as a support piece so that youre covered no matter what happens in combat
Mystic Remora ($9.48) Mystic Remora is an incredible draw spell that is on par with cards that are far more expensive
There are hundreds of artifacts with draw in their text box, so if what your deck needs isnt in this article, do try your luck searching around Scryfall a bit