Super creative thinking time:
So I’m assuming viruses are planned (I would like to see that in microbe stage), I’m more worried about world ending kind of stuff here. So could super viruses evolve that might begin wiping planets off the planet? This would not be an event but a thing that happens naturally (auto-evo like everything else).
I kinda want to play as a parasitic organism but one that can take over creatures. My dream thing to play as would be a Thing like creature that doesn’t have a true form but mimics other creatures that it has killed and infects other life forms slowly replacing their cells with it’s cells until they become another Thing. Imagine if something auto-evoed into that and you had to watch out for them on the aware stage.
Skip a bit farther to half of this, just wanted a visual aid.
What if a zombie like virus started because of a fungus, like what happens to ants, or maybe a parasite that takes over a creatures mind. Dealing with zombies as an animal, a tribe, or an advanced empire, this could happen anytime naturally.