Bullywug Witch Doctor

Amphibious. The bullywug can breathe air and water.

Speak with Frogs and Toads. The bullywug can communicate simple concepts to frogs and toads when it speaks in Bullywug.

Swamp Camouflage. The bullywug has advantage on Dexterity (Stealth) checks made to hide in swampy terrain.

Standing Leap. The bullywug’s long jump is up to 20 feet and its high jump is up to 10 feet, with or without a running start.

Spellcasting. The bullywug is a 7th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 13, +5 to hit with spell attacks). It has the following cleric spells prepared:
Cantrips (at will): light, sacred flame, thaumaturgy
1st level (4 slots): bane, healing word, protection from evil and good
2nd level (3 slots): augury, hold person
3rd level (3 slots): bestow curse, feign death, mass healing word
4th level (1 slot): banishment, control water

Multiattack. The bullywug makes two melee attacks: one with its bite and one with its spear.

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 3 (1d4 + 1) bludgeoning damage and the target must succeed on a DC 12 Constitution saving throw, taking 21 (6d6) poison damage on a failed save, or half as much damage on a successful one. 

Spear. Melee or Ranged Weapon Attack: +3 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 4 (1d6 + 1) piercing damage, or 5 (1d8 + 1) piercing damage if used with two hands to make a melee attack, and the target must succeed on a DC 12 Constitution saving throw, taking 21 (6d6) poison damage on a failed save, or half as much damage on a successful one.

Poisonous Retribution (2/day). When a creature within 30 feet of the bullywug hits an ally of the bullywug with an attack, and the bullywug can see the creature, the bullywug can force the creature to make a DC 13 Constitution saving throw. On a failed save, the creature takes 14 (4d6) poison damage and is blinded until the end of the bullywug's next turn, or half as much damage and is not blinded on a successful one.