Avecki (5e)

Small Beast, neutral 
Armor Class 10
Hit Points 16 (3d8)
Speed 20 ft., swim 30 ft.

STR 12(+1)
DEX 13(+1)
CON 11(+0)
INT 2(-4)
WIS 10(+0)
CHA 3(-4)

Senses Ultravision 90 ft.
Languages n/a
Challenge 2
Leap. The Avecki is able to leap 20 feet forward and half that distance backward or upward in a single jump.

Acid Spit.
Ranged Attack: +2 to hit, reach 5 ft., one target. Hit: 10 (2d8) poison damage. The target must make a DC 10 Constitution saving throw, taking 10 (2d8) poison damage on a failed save, and only taking half on a successful one. If the target fails their saving throw, they also become blinded.

An avecki is an amphibian that closely resembles a frog. When squatted down on its four legs, which is its customary stance, an avecki is three feet high. The creature has several layers of thick, leathery skin, which provides a natural defense. Unlike a frog, an avecki’s head is narrow and has three eyes that make it impossible to surprise. It has the equivalent sight of ultravision with a 90-foot range and can automatically spot hidden creatures. An avecki may leap up to 20 feet forward and half that distance backward or upward in a single jump. Their webbed feet allow them to move quickly in the water. 

In combat, an avecki attacks by spitting acidic fluid at prey within melee range. The fluid inflicts 2-8 damage and forces the victim to make a saving throw vs. poison (-2) or become blind.

The blindness typically lasts 1d4 days, but there is a 25% chance that the sight loss is permanent unless cured with spells or alchemic remedies.

These creatures are found mainly in lakes, swamps, and other wet areas. They feed on large insects, worms, fish, and arachnids but will attack humanoids if hungry or provoked. Avecki live in small groups ranging from 1 to 4 and make their lairs in muddy dens.