The lizardmen block Mel from going past, and the lizardman in the swamp shoots a dart at Mel.

Attack roll: VS.AC - (1d20+10)[23] 1 damage, and the lizardman makes a secondary attack. VS.FORT - (1d20+8)[22] and Mel takes 5 ongoing poison and is slowed (save ends both). If the primary attack hits, the hidden lizardman is no longer hidden. if it misses, he stays hidden.