Amulet of Vigor

What looks like a niche fixing-tax remover is really a permission engine for an entire archetype that would not exist without it. The text reads narrow: anything you control entering tapped untaps immediately. But it does not care why the permanent is tapped, and that breadth is the whole point. Lands that enter tapped come in untapped, which means a bounceland like Simic Growth Chamber stops costing tempo and starts generating it: it returns a land, replays it, and untaps for two mana the turn it arrives. Run two copies and the loop doubles. Stack a Tolaria West or a fetch into the right untapping land and the mana accelerates past curve in a way the manabase should never allow. The combo deck built on this premise sequences cheap lands and bounce effects into explosive turns far earlier than its land count suggests, and the artifact is the linchpin that converts every "enters tapped" drawback printed across thousands of cards into pure upside. The design lesson is that a downside-cancellation effect is only as powerful as the volume of downsides it can erase, and "enters tapped" is among the most common drawbacks ever printed. A one-mana artifact that quietly voids that entire category of restriction was never going to stay a curiosity; it became the foundation of a deck named after itself.