Archway of Innovation (MH3 350)

Land • Modern Horizons 3 • Rare

This land enters tapped unless you control an Island.
{T}: Add {U}.
{U}, {T}: The next spell you cast this turn has improvise. (Your artifacts can help cast that spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)

Illustrated by Sam Burley.