—Inspiration by more recent games.–
AoE IV mechanic.
New to Age of Empires 4 is a fire mechanic for buildings. Once a building drops below 25% hitpoints — no matter the type of damage that reduces it that low — it catches fire. A flame emblem appears above it to signify that it's ablaze.
At this point, you as an attacker can move on to another building. Left unrepaired by a Villager, a building that is on fire will eventually burn down to nothing. You c