Imagine casting Mana Geyser into Past in Flames and then Mana Geyser again for insane amounts of mana
And the card draw trigger gives your 2-mana commander some late-game relevance
Mind Over Matter untaps more permanents than just artifacts, so its kind of bigger than this list, but it does specify artifacts so were going for it
Try a few different combinations and see what works for you
Since it was similar to other side games such as the 2012 Pokmon Conquest Nintendo DS Spin-off, many players assumed that Rumble cards wouldn't be worth much
That's very Golgari, but now you trade green for blue, and in doing so you open yourself up to mass card draw, filtering, counters, bounce, stealing, copying, and many more effects