From Guild Wars 2 Wiki
Portal Spikes are objects found during the destruction of the three portals inside The Ruptured Heart. Once a portal has been destroyed, the Spikes disappear. Interacting with them grants the Realm Residue effect, which can be used on the portal in order to damage it.
- Help destroy the East Realm Portal (80) [Group Event]
- Help destroy the North Realm Portal (80) [Group Event]
- Help destroy the West Realm Portal (80) [Group Event]