It occurred to Leff that she hadn't learned how these things stood up to ordinary fire, so she took a few potshots with firebolts at some of the ones with arrows in them.

Spoiler: Like three tries I guess.
Show
(1d20+7)[18]; (2d10)[12]
(1d20+7)[13]; (2d10)[11]
(1d20+7)[10]; (2d10)[19]


She carefully watched the monsters she hit, looking for signs of pain or, failing that, weakening.