Lizard's Mouth

Lizard's Mouth is a early-game 25% (1/4) chance boss drop that deals both piercing and recurring acid damage. It is relatively easy to get, as it drops from the Bone Captain, which can be even the first boss fought by the player characters. It will also rarely (1%, 1/100) drop from Black Lizard Minions. The daggers can be used quite effectively even at higher levels, when multiple are used with the help of a Crit Beacon.

Mechanics

Dagger: On a critical hit, the target must make a DC 12 Constitution saving throw or take 1d4 recurring acid damage. The target can repeat the saving throw at the beginning of Their turn to end the damage. Upgradable: increases recurring damage to 1d6 (#2), 1d8 (#3) and 1d10 (#4). The dagger cannot be upgraded further.