The Futuristic Age is where Battle Room Empire shows its whole hand. Energy becomes the resource that gates your most advanced technology, Rare Crystals support the highest-value systems, and units like laser tanks and war mechs share a battlefield with everything that came before them.
Nothing from your earlier ages becomes irrelevant — that’s the point. A futuristic army still needs screening forces, still fears the right counters, and still loses to a smarter opponent. Dragons and mechs in the same engagement isn’t a spectacle for its own sake; it’s the game asking whether you can command force types with completely different rules at the same time.
Defensively, the era has a signature vulnerability: dependence. The empire whose power grid goes down is suddenly fighting with half its strength, which makes energy infrastructure the most contested real estate of the endgame.