From 2speccers2tools wiki

As a result of the hot planet being cleared of life, a group of Sphere of imminent doom have settled down and stopped using spite, not relying on other organisms in general, feeding on the minerals and heat provided by the hot planet. They have lost their eye and arms, as they nolonger need to kill or defend themselves, though will eat dead cells and/or colonies if they find some They slowly crawl along the surface of the hot planet, feeding on dead matter and minerals they find themselves able to consume. If anything that weighs over 10 kg puts all of its mass on a cluster, they will begin to sink in, and this is their only remaining form of predation, as they will begin to sink into the cluster and be slowly digested over time.