CINCU, Romania — Move over, Dracula. Transylvania has a new villain. In the rugged, forested mountains of central Romania, 5,000 NATO troops gathered to fight off a make-believe enemy. In what the alliance billed as a “show of force,” two French Puma helicopters dropped from the clouds, skimming low over the hills as tanks and howitzers rolled into position and fighter jets and drones streaked across the sky. “The scenario’s main goal is deterrence,” said Maj. Gen. Dorin Toma, commander of NATO’