NPCs in SpawnGroup

• an_inactive_trap (50%)
• a_blast_of_heat (50%)
• a_dark_entity (50%)
• a_formless_terror (50%)
• a_low_hum (50%)
• a_magi_construct (50%)
• a_null_field (50%)
• a_wardstone (50%)
• a_wave_of_cold (50%)
• a_wizard_construct (50%)