Arknights: Eternal Hunting's Fiery Heart

This is a story about the pursuit of gods in the land of Terra. In the ancient classics, there is a proverb. There are four types of warlock hearts: ice blue, pale, dark black, and fiery red. And if the Source Stone fades and the light gradually goes out, then go throw your ice-blue heart into the flame! This is year 1142 in the Terran calendar. In the absence of gods, the land trembles. However, if the fiery red heart does not die, the pursuit will not end.