Valmiki Ramayana Bala Kanda Sarga 26 Shloka 19

अन्तर्धानं गता vanishing from the sight, यक्षी that yakshi, मोहयन्तीव as if deluding, मायया with the power of magic, कामरूपधरा capable of assuming forms at will , सद्य: immediately, अनेकश: in various ways, रूपाणि forms , कृत्वा having assumed, अश्मवर्षम् rain of heavy rocks, विमुञ्चन्ती releasing, भैरवम् frightfully, विचचार ह moving about.

Capable of assuming forms at will, that yakshini intending to delude the princes through her power of magic, vanished from the sight. She then assumed various forms and released a rain of rocks. And started moving about frightfully.