Archway of Innovation

Improvise has always lived on the spells themselves: Reverse Engineer, Chief of the Foundry, the cards printing the keyword directly into their text. Handing the mechanic to a land is the wrinkle here, because it decouples the artifact-tap discount from any single payoff and turns it into a mana source you can point at whatever you draw. The activation is a two-step tax: spend the untapped mana and the tap to grant the next spell improvise, then cast that spell and start tapping artifacts for generic. That sequencing matters, since the ability must resolve before you begin paying, so the discount only reaches a spell you cast the same turn and only after you have committed the land's own tap. It reads as a strictly worse blue source until you have a board of artifacts sitting idle, at which point the land converts stored metal into a burst of generic mana on a spell that never asked for it. The Island check is the leash: it enters tapped unless you already have real blue mana online, so it wants to arrive on a developed board rather than turn one. That is the honest trade for stapling a repeatable cost-reducer onto something that also just makes blue mana. A land that produces mana and manufactures more of it from artifacts you were never going to attack with is a narrow tool, but the narrowness is exactly what makes it worth building toward rather than jamming.