Jiao hopped off the rock as the L'ma came closer and began to thrash about, attempt to hurt those wanting to attack it - in it's panic, it seemed likely it might hurt more people on the beach. Flying up to avoid the waves it was sending out, she thought she might be able to calm it; not by raising it but by tricking it.
Concentrating, she tried to use her Glamour to hover clouds over the surface of the water, wispy and soft like those on a Longheat's day. Hopefully, the L'ma might see them and be comforted with thoughts of the sky above, she thought.
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In an attempt to calm the L'ma to defend those it might harm, Jiao uses her Glamour magic to try and create clouds around it, so it thinks it's in the sky.