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Being able to ramp the best land out of the top four cards of your deck at instant speed is already very useful, but the fact that you can still draw one of them into your hand as a fall back means that you wont have a major downside (see Growth Spiral for a similar effect)

While this combo has generally been too slow and fragile for legacy (while being a powerhouse in modern), maybe having a Kiki-Jiki Mirrorbreaker that costs three will change that

Once you have a big board, you can use End-Raze Forerunners to make a big swing, you can use Skullclamp to cash in tokens for more resources, and so much more

Initially, there was talk about Wurmcoil Engines, Dark Confidants, and Brainstorms coming to Historic, which I found concerning