The nucleus gains activity at a base rate of 10% per day . A Warden must periodically suppress it to prevent a breach. Suppression speed scales with a pawn's Psychic Sensitivity.
Tia looked down at her hands. The skin between her fingers was weeping a clear sap. She’d stopped trying to wash it off. She looked at the others: Mendez, the farmer, now missing three fingers he’d hacked off after they sprouted tiny, toothy mouths. Little Whiskers, the colony’s tame megasloth, had grown a second, weeping eye on its flank. They’d had to put Whiskers down. rimworld fleshmass nucleus
Defeating a Fleshmass Nucleus requires preparation. It is not a standard raid; it is a siege. The nucleus gains activity at a base rate of 10% per day