Lily pauses just long enough to see what the beast will do. If it sees her and approaches, she'll fly away at the same speed (if she can, fly speed 30) and launch another bolt of mystical energy at the creature. If it seems not to see her, or goes another direction, she'll shoot it again, and move to a more visible, obvious square...trying to attract its attention.
(Basically a delay then, I s'pose)
(Basically a delay then, I s'pose)