NPCs composing that spawngroup : lava_duct_crawler (50%) stone_spider (50%)

NPCs spawning around that spawngroup : (Max range : 100) soldungb_61, range=28 (-976,-337,-57) lava_duct_crawler (100%) lava_duct_crawler (100%) soldungb_62, range=92 (-940,-279,-83) lava_duct_crawler (50%) lava_duct_crawler (50%) soldungb_64, range=87 (-1009,-433,-18) sonic_bat (50%) sonic_bat (50%) sonic_bat (50%) sonic_bat (50%) soldungb_65, range=72 (-968,-282,-83) lava_duct_crawler (50%) lava_duct_crawler (50%) soldungb_66, range=96 (-906,-337,-59) lava_beetle (50%) lava_beetle (50%)