>>5679735> "Shell Blockade" - The hard shells of these creatures turn them into natural barriers, making it difficult for invaders to get a foothold.IG: TAG: ARMOR. Creatures that are not part of this creature's branch cannot expand or migrate from terrestrial tiles (Ancient Ruins, Scraplands, Frost Area) into tiles where this creature is thriving unless they can eat them. Minor advantage on shallows tiles.