From Pathfinder Impossible Magic, which isn't enabled.Enable this sourceVibration SenseFEAT 4EVOLUTIONSUMMONERYour eidolon gains Tremorsense as an imprecise sense with a range of 30 feet. If aquatic, it gains Wavesense as an imprecise sense with a range of 30 feet instead. If amphibious, it gains both.Pathfinder Impossible MagicORC
Vibration SenseFEAT 4EVOLUTIONSUMMONERYour eidolon gains Tremorsense as an imprecise sense with a range of 30 feet. If aquatic, it gains Wavesense as an imprecise sense with a range of 30 feet instead. If amphibious, it gains both.Pathfinder Impossible MagicORC