The artist who drew the picture made the Leaper look smart than it is. It has an intelligence of 2, but the Joker-like smile looks like it knows something.
It's curious that leapers don't have a jump special ability, so I made a few teaks by reskinning a giant frog and adding the half-green dragon template.
Medium monstrosity, neutral evil
Armor Class 11
Hit Points 18 (4d8)
Speed 40 ft., climb 40 ft.
STR | DEX | CON | INT | WIS | CHA
12 (+1) | 13 (+1) | 11 (+0) | 2 (-4) | 10 (+0) | 3 (-4)
Skills Acrobatics +3, Athletics +3, Perception +2, Stealth +3
Damage Resistances poison
Senses darkvision 30 ft., passive Perception 12, blindsight 50 ft.
Challenge 1/4 (50 XP)
Standing Leap. The greenspawn leaper's long jump is up to 20 feet and its high jump is up to 10 feet, with or without a running start.
- Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) piercing damage.
- Poison Burst (Recharge 5-6). The greenspawn leaper exhales poisonous gas in a 5-foot radius. Each creature in that area must make a DC 11 Constitution saving throw, taking 21 (6d6) poison damage on a failed save, or half as much damage on a successful one.
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