For one Blue mana, you can return an Artifact you control to your hand and then put an Artifact from your hand into play for free
Echoing Deeps Rating: 4/10 Just like Cavernous Maw, the main reason to want this is because its a cave
This one is a rare example of the original text getting quicker to the point than the up-to-date ruling
BPhillipYork: Neato, fits nicely into these themes of playing artifacts for energy, especially if you use eggs (the series of artifacts that do something on cast/enter and leaving the battlefield) and pair it with cost reduction
One of the most popular limited formats is Booster Draft, in which players open a booster pack, choose a card from it, and pass it to the player seated next to them
Thankfully, pure chaos was avoided