Caidacyn makes note of the odd behaviour of the Formian, and freezes when it stops moving. Making sure to keep a safe distance, she scans it for the presence of any magical auras.

Spoiler
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Using Detect Magic spell-like ability on the Formian, concentrating for 3 rounds - unless it moves towards her or makes a hostile action; in which case retreat back down the wall.

Some preemptive Spellcraft checks (J-H, let me know if you should be rolling these instead of me):
(1d20+10)[21]
(1d20+10)[28]
(1d20+10)[29]