Maelstrom ArtisanMaelstrom Artisan Well, lets not beat around the bush
It grows with +1/+1 counters, draws cards when you cast 4-power threats, and eventually turns that board presence into direct damage to opponents
Where the card shines, though, is in its overload ability, which lets you cast the card for a higher cost and extends its effect from a single creature to each one you don't control
More were released in Japan, but they never saw American release due to the discontinuation of the device
For example, if you attacked twice with Don & Raph in the same turn without casting any noncreature spells in between those attacks, the next noncreature spell you cast that turn would cost less to cast for each artifact you controlled