As Senna approached the staircase that lead down to the fourth floor, she'd notice something out of place. Amidst the utterly empty circular stone room, there was a single thing out of the ordinary, positioned next to the entrance to the staircase. 

A statue, carved of stone in the rough shape of a humanoid being. While it lacked any sort of distinguishing features, the figure seemed to be modeled after a male. Like Senna's bow and Alex's medallion, it seemed to exude a slight pressure. Just as Senna laid eyes on it, though, she would hear a familiar voice in her mind, the voice of Cernunnos.

[i]'...the formula's still active? I would have thought it'd be destroyed by now. Hmph, when Loki finds out...'[/i] The God's voice reverberated inside of Senna's head. [i]'Hey, Senna, are you okay with nicking yourself a bit and putting a drop of blood on that statue? If I'm right, you'll know why I'm asking you to once you've done it. If something does happen with that, ask your friend to do it too, alright~? If those things are still working, they'll be a massive help~! Also...be careful on the next floor. If this is here...next floor might have something stronger than what you've been fighting up until now.'[/i]

Meanwhile, the slime continued its flight down to the fourth floor. Do your best, slime.

Oh, right, and if anyone happened to glance at Senna's arrow, they'd discover it to be...melting? Not quite melting, but corroding, getting steadily eaten at by the red slime that coated it. Maybe touching it is a bad idea.