Bullywug Rider

Amphibious. The bullywug can breath air and water

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

Standing leap. The bullywug's long jump is up to 20 feet and it's high jump is up to 15 feet, with or without a running start. 

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

Spear. Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 8 (2d4 + 2) piercing damage, or 9 (2d6 + 2) piercing damage if used with two hands to make a melee attack.

Turtle Mount Bite. Melee Weapon Attack: +4 to hit, range 5 ft., 1 target. Hit: 4 (2d4) piercing damage. On a successful bite regain hit points equal to half damage dealt.