In Portal Challenges, you will be introduced to a brand new world for your character to travel to. Portal Challenges are a little more difficult than other challenges, but they offer exclusive items.
As your OC journeys to different portals, they'll earn a triangular patch or badge similar to this one
To complete your apprenticeship, you'll need to complete a Portal challenge. We recommend starting with Avangard but there are many portals to choose from.