SituationalFixer and XenoCity define two decisive thresholds in Socioplastics: the moment when an ordinary useful object becomes a field anchor, and the moment when the city reveals itself as a shared condition of estrangement, hospitality and civic recomposition. In SituationalFixer, the artwork is not separated from use, body, movement or circumstance; it remains active precisely because it circulates through them. The Yellow Bag is the paradigmatic case: a portable object that continues to function as a bag while acquiring artistic value through recurrence, placement, recognition and relational intensity. Its power lies in the shift of perception. When its status remains unknown, the situation stays relaxed; when it is recognised as portable art, the surrounding field becomes affected. This makes SituationalFixer one of the most precise operators in LAPIEZA-LAB: it converts ordinary life into durable epistemic infrastructure without removing the object from the world. XenoCity expands that logic from object to urban condition. The city appears as a space where the stranger, the migrant, the walker, the provisional body and the untranslated presence are not exceptions to civic order, but the very material through which the common becomes visible. If SituationalFixer anchors a field through a useful object, XenoCity activates the field through urban estrangement: hospitality, drift, foreignness, non-place, public space and everyday coexistence become structural forms of knowledge. Together, these two operators produce a powerful socioplastic thesis: art does not need to withdraw from function, and the city does not need to erase difference in order to become intelligible. A bag, a street, a body, a threshold, a café, a beach, a museum or a pavement can all become active sites of meaning when recurrence, naming and attention transform context into method. SituationalFixer gives Socioplastics its portable anchor; XenoCity gives it its civic horizon.