Portals are the room of eight portals. All of them are deactivated. To activate them, you have to find a Elemental Portal Core (EPC). However, you have to get two of them for complete journey, since EPC elliminates itself, once you cross the portal.
Red Portal Edit
Orange Portal Edit
This one's destination is unknown. To made it's Orange EPC you have to find special material, which is not discovered yet.
Yellow Portal Edit
Green Portal Edit
Blue Portal Edit
Purple Portal Edit
Leads to the Kingdom of Miracalis. It's EPC is made out of ??!??!?!??!!!!
Black Portal Edit
Rainbow Portal Edit
Leads to Phantasm. EPC is made out of all other EPCs