To @TAKASHI (Alan), @Cynric, @ATACIUS (Gabriel), the elven scouts, Indrian, Angon, Herm, and Claudia, the finale of the scroll is anticlimactic - there's the suggestion of a brief flash, almost a blink of an eye fast, and the ornate metal door simply swings open.
To @CALLIN, it's obvious that a great deal of arcane magick just happened in the area around the cage, but it's hard to make out. There is a type of brief glow.
To the elven mages, @Graian and @Doc (Bellesh/Brother Calandro), the bars glow a deep blue/orange color. Sigils and glyphs appear to leap from the bars and center on a swirling vortex centered on the cage door. Swirls of arcane follow those symbols and the bars cease to glow. All too quickly, the vortex collapses on itself, the door glows bright and then dims, swinging open.
The restricted area awaits!