A Dimension Portal is a key travel item in Spyro: Shadow Legacy that allows Spyro to phase into the real world and the Shadow Realm. They are located all over the Dragon Realms, but haven't been used for thousands of years according to Tomas. They can only be used if one bears the Shadowstone. Phasing through the portal changes ones physical abilities, such as allowing Spyro to glide higher, defecting flame-ability and letting one through certain solid objects.
Gallery
Phasing