One-Eyed Cave Frog

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Small Beast, Neutral

Armor Class 12 (natural armor)

Hit Points 27 (6d6+6)

Speed 20 ft. swim 20 ft.

STR 12 (+1)

DEX 16 (+3)

CON 12 (+1)

INT 4 (-3)

WIS 13 (+1)

CHA 6 (-2)

Saving Throws Dex +5, Wis +3

Skills Stealth +5, Perception +4

Senses darkvision 60 ft., passive Perception 14

Languages —

Challenge 2 (450 XP) Proficiency Bonus +2

Actions

Multiattack. The creature makes two Bite attacks.

Bite. Melee weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 5 (1d6+2) piercing damage.

Vertigo Croak. The frog croaks in a resonant tone that travels through the caverns. Each creature within 15 feet that can hear the croak must succeed on a DC 12 Wisdom saving throw or be affected by disorientation for the next turn. On a failed save, the target has disadvantage on attack rolls and ability checks that rely on balance or precise footwork until the end of its next turn.

Environment Underdark

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Lore & Description

Appearance

A squat, moss-green frog about the size of a halfling’s hand, crowned with a single lidless eye that gleams amber in the dim caverns. Its skin glistens with wet sheen, slick and warty, and its mouth is a circular, tooth-filled gape. The one eye watches motion with unsettling calm, and when it opens fully the cave seems to tilt for a heartbeat as its croak threads through the rock like a whispered fever. The croak, while mild, unsettles balance and disorients prey, giving the frog a moment to strike or vanish into shadowy pools.

Behavior & Origins

In the damp tunnel networks beneath the mountains, the One-Eyed Cave Frog makes its lair in still pools and on slick ledges. Its lone amber eye surveys vibrations in the water and air, and its croak—a soft, lingering note—sends a momentary vertigo through nearby creatures. The effect is enough to break concentration and stumble adventurers, letting the frog slip away into the echoing darkness. Though small, its bite can be piercing, and its habitat—dark, dripping caverns—protects it from larger predators while offering a nearby source of insects and small prey.

Generation Info

Original prompt:
"A one-eyed cave frog whose croak causes mild vertigo."

Created: Feb 2, 2026
Modified: May 31, 2026