Earth Issued No Reply — The Hull Without a Name Answered for All of Them

The Vael Consensus sent an ultimatum to Earth and dispatched four thousand ships to enforce it — their archive held a classification entry for every vessel any civilization had ever built, and Earth's answer was a single hull that returned null on every parameter in that archive. What happens when the most precise war machine in the galaxy cannot name what it is looking at — and cannot fire without a name?