Kambal, Consul of Allocation seems like a card for sideboards in Collected Company or Death and Taxes so they can better combat burn. Even if it draws a quick bolt, it traded one for one and you drained for two.
Cultivator’s Caravan seems like a card that I would play in EDH and maybe standard, depending on what the format looks like. It’s a three drop mana rock that can tap for mana on it’s first turn, and it can swing in for lots of damage in the later game.
Aether Hub is an interesting card. It’s kind of like the Vivid cycle, but it enters untapped. A few for color fixing might help some Standard decks. If there’s a good Energy commander, This just becomes a penta-land, which is pretty insane.
What do you think? Comment below!