The ritual room (aka the basement)

"Where will we hold this summoning?" Daisy asked as she ran with you through the now-empty halls, the students all in their classes while a staff member was helping free a blushing and embarrassed Yiantra from in the boy's dorms.

"The giant old basement underneath the school. Lots of room for the ritual." You replied, rushing with her down the winding and twisting stairs to reach the lower levels.

After you reach the first level, you run along the grey cobblestone floors as you turned a corner to a lesser visited corner of the academy, prying open the thick basement doors.

"Ladies first." You mention to Daisy, "Oh! What a gentleman!" She ditzily giggled, descending the stairs while her fat round bubble butt swung to and fro. You smirked as you followed after her to catch the incredible view, your true intentions being to sneak a peek.

In the basement, it had stone walls and was a wide area used as a storage space. Due to a spell being cast from the doorway to the room, it acted as a pocket space, being way bigger than it initially seemed.

"Alright, let's get cracking." You found a large enough area and unleashed the panties from the pocket space orb, bursting out like a tidal wave for a few seconds before dying down.

"Wheee! Panty pile!" Daisy immediately leapt into the huge pile like a comfy bed, bouncing with the multi-colored cotton cushioning.

"Alright. Time to follow the instructions within the prophecy. I'll need your help, Daisy!" You grabbed a couple of panties and instructed Daisy on what to do.

After a few minutes of work, you looked down to see the fruit of your labour. Following the design of the sigil in the sacred scrolls, you arranged all the panties into a circle with an incredibly intricate pattern filled with lines and curves within. This was the sigil to summon the "long lost **** of good". You put the finishing touches, before walking with Daisy to the bottom point of the giant panty sigil.

"To summon powerful beings, a sigil made with magical conduits needs to be assembled." You explained to Daisy, who you knew never listened in classes (if she even attended), "what summons the beings aren't the conduits that conduct magic, but the magic itself flowing through them in the design of a sigil, sort of like a calling card. The conduits have to be attuned to the fetish of the user in order to maximise the magic flowing through."

"Which is why you use panties in the ritual. Got it." Daisy nodded her head, knowing that she only followed you around to watch the expressions of girls rendered nude, the magic stuff being of secondary concern.

"Here goes nothing." You steady yourself and smirk, kneeling and placing a hand on the panties to channel your fetish energy through.

The panties burn up and sizzle away, a sign of your magic manifesting. The burning sets off a chain reaction, the panties burning away one by one tracing the sigil shape until the full shape was traced, the fire turning blue.

After the last panty burned away, a bright flash of blue light burst from the sigil, leaving you and Daisy to cover your eyes as the blue light turned to white, glowing brighter with blue flame spirals forming until both the flames and light finally died down.

You and Daisy uncovered your eyes to see...