A game-breaking combo hasnt appeared yet, but it will
Create X 1/1 green Saproling creature tokens, where X is that artifact's mana value

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Card draw is one of Magics most important resources, so swiping it for yourself is a horrid swing in your favor
When a Masters set has a high expected value, it's a lot easier to justify spending $45 on a booster draft or $200 on a booster box because even though the up-front cost is high, you know that you'll get some of that money back in the form of cards you can use to build decks or, if you don't get the specific cards you need, trade or sell to get the cards you do need for your decks
Then Will of the Sultai will let you either mill three and then return all lands - nasty good here, or toss +1/+1 counters on a dork equal to your land count and trample for a turn, and if you control your leader