go Tera go ! the one person we can trust to get to work figuring these things out. 

The eyes of the wise...
that pierce through the fog of ignorance
Open up inside me
until I see, I truly see

so yeah, this is the same spell as in episode 4, and u know what's wild? also page 59. much to think about. 

TRANSCRIPT:
panel 1: A transformed preachan jumps to try and catch Tera. She calmly floats higher to avoid it. She continues looking through her notes. Tera: "It seems to only impact the 'highest level' of preachan... fascinating..."
panel 2: She puts a finger to her chin and continues: "And though they do seem..."
panel 3: We see one of the transformed preachan gnawing on someone's arm. Tera continues (off-screen): "rabid... for lack of better term..."
panel 4: We see two preachan sitting by each other, one hissing up at Tera. Tera continues (off-screen): "They do coordinate... they aren't attaching each other."
panels 5-6: Tera frowns, thinking. And the looks to the side and asks: "Why..."
panel 7: Tera chants the same spell that revealed the crystal spire to her. She twirls around, forming her magic circles. Tera: "Suilean an fhuaraidh.. tha sin a 'tolladh tro cheo an aineolais.. osgail a-staigh orm... gus am faic, mi gu firinneach..."