A vast reed-covered area is unlikely to harbor magicalized creatures on only one side while the rest remains empty. This situation likely only has one explanation: a vicious creature is hidden below, having driven away or consumed the other creatures.
The mission couldn't stop based merely on guesses.
"Where's the thing?"
"Hehe, here it is."
Signaled by Cody, Hayden took a toad out of his pocket.
Upon closer inspection, it was a fat-bellied toad with wings similar to those of a bat, as if it had come from a lab.
Cody took the bat-winged toad and fed it several Mania Potions, making its belly round and swollen before casually handing it back to Hayden.
"Go."
Hayden patted the bat-winged toad and sent it forward. The toad flew over the reed field, spraying Mania Potion while flying, occasionally returning to replenish its supply until it had covered the entire area with the potion.