The Testing Orb

Upon entrance to Wistross  students are taken to the Testing Orb, the purpsoe of which is show what power source they have affinity to. The Orb itself is slightly over 6ft accross and appears in its natural state to be a glasds orb containing shimmering golden light.
The Orb reveals 2 aspects about a persons power affinity. its source and nature.
The contents will change depending what is detected, colour for nature and texture for source.
Nature: Arcane = Purple with streaks of electric blue. Celestial = Brighter gold Ki = invisable Rage = Blood red Stamina = Beige
Source: Bubbling viscous liquid = Internal Source Fast flowing like a breeze = External Source Forming Shapes = Connection based