Suspicion escalated the meeting into sudden violence. Nahiri pulled at the Skyclave’s stone to create distance, misjudged the strength required and fell through the structure. The spark-hedron dropped with her into the pile of Phyrexian metal she had spent so long removing.
When she recovered it, the fragile layers were broken and the power inside was gone. Whether restoration had ever been possible no longer mattered. The object had carried her last practical route back to planeswalking, and its loss gave grief a target standing outside herself.
Nahiri concluded that Zendikar’s recurring catastrophes shared one cause: powerful outsiders arrived, acted and left the plane to absorb the result. She committed herself to closing her home against planeswalkers. The vow was protective in intention and dangerous in its refusal to distinguish visitors from invaders.