Servius Calventius Pamphilius
Yuan-ti Evoker
AC: 13 / 16 (Mage Armor) HP: 27/27
PPer: 11 PInv: 17 PIst: 11
Conditions: --
Concentrating:

Servius follows Fork south to the other island. He still doesn't see anything, so maybe it's just swamp gas. In case it's not, he holds a minor spell ready to slow down the frog creature.
Spoiler
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Readied Frostbite, range 60'. On a failed DC 15 Con save, the target takes (2d6)[8] cold damage and has disadvantage on its next weapon attack roll before the end of its turn.