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Crucible of Worlds One might argue that Crucible of Worlds and the more vulnerable Ramunap Excavator do much less than Conduit of Worlds, which is hard to argue with

While this likely isn't the plan of a tournament deck, Sundial of the Infinite has a cult following in Commander and is the perfect Against the Odds card, so while this interaction likely won't break into Modern, people will try it, and it will be awesome when it works

Rofellos, Llanowar Emissary = very poverful green commander, who's around the powerlevel of Selvala

When you put Dockside into games that drop more mana rocks and other permanents on T1-2, it can make an egregious amount of mana as early as Turn 2

Library of Alexandria If you have seven cards in hand, just tap Library of Alexandria to draw an extra card