Cave Iguana

Acidic Saliva. The iguana's saliva can dissolve most rocks in a period of time, making it an adept burrower. When a target is hit with a Bite or Spit attack, its armor is coated in acid. A creature can spend one hour attempting to clean the armor, at the end of which it must make a DC 12 Wisdom (Medicine) check. On a success, the creature successfully scrapes the acid off of the armor. On a failure, the creature takes 2 (1d4) Acid damage and fails to remove the acid from the armor. The acid completely destroys a nonmagical set of armor after 8 hours of contact. Only one instance of acid can affect a set of armor at a time.

Bite. Melee Attack Roll: +4, reach 5 ft. Hit: 9 (2d6 + 2) Piercing damage.

Spit. Ranged Attack Roll: +3 range 15/30 ft. Hit: 11 (2d10) Acid damage.

Tail. Melee Attack Roll: +4, reach 10 ft. Hit: 11 (2d8 + 2) Bludgeoning damage, and if the iguana moves 20+ feet before making this attack, it deals an additional 9 (2d8) Bludgeoning damage and the target is Prone.