Deadly Dispute works well with Eyetwitch but also gives us something to do with discard creatures like Acquisitions Expert and Elderfang Disciple, which generate most of their value with their enters-the-battlefield trigger by allowing us to turn them into two new cards and a Treasure token for Devour Intellect or to ramp into Tergrid, God of Fright
Since the mana generated can only be used for Artifacts, this card was restricted instead of banned
It also has a much smaller footprint, since an elastic band uses up much less space than a deck box
Some involve an imbalanced resource conversion, like [casthaven]Ancient Tomb[/casthaven] (two life is absolutely worth an extra mana), others rely on a resource strong enough to easily build a deck around, such as [casthaven]Tolarian Academy[/casthaven] and [casthaven]Mishras Workshop[/casthaven]
By morning, the fire was out and Ellwen was gone.
Filter lands are likely the next best to add in and after that the humble check lands or the scry lands would be my advice