Dingonek (5e Creature)
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Large monstrosity, neutral evil
Pounce. If the dingonek moves at least 20 feet straight toward a creature and then hits it with a claw attack on the same turn, that target must succeed on a DC 17 Strength saving throw or be knocked prone. If the target is prone, the dingonek can make one bite attack against it as a bonus action.
Rampage. When the dingonek reduces a creature to 0 hit points with a melee attack on its turn, the dingonek can take a bonus action to move up to half its speed and make a bite attack.
Reckless. At the start of its turn, the dingonek can gain advantage on all melee weapon attack rolls it makes during that turn, but attack rolls against it have advantage until the start of its next turn.
Relentless (Recharges after a Short or Long Rest). If the dingonek takes 20 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead.
Running Leap. With a running start, the dingonek can long jump up to 25 feet.
Multiattack. The dingonek makes three melee attacks, only one of which may be a sting attack. It may substitute the sting for a tail attack, but can't use the tail and other attacks against the same target.
Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 10 (1d10 + 5) piercing damage.
Claws. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage.
Sting. Melee Weapon Attack: +8 to hit, reach 5 ft., one creature. Hit: 10 (1d10 + 5) piercing damage, and the target must make a DC 12 Constitution saving throw, taking 22 (4d10) poison damage on a failed save, or half as much damage on a successful one.
In the murky waters of the darkest jungles, lies a terrifying monster. A predator with a reputation of violence, ferocity, and an aptitude for hunting all but elephants. Locals shiver when they hear the name, "dingonek."
River Hunter. The dingonek are vicious ambush predators that take their prey and drag them under from the water's edge. These creatures possess a leopard-like head, with two long, tusk-like fangs, grey, spotted scales covering its body, and a sharp, dart-like appendage at the end of its tail which secretes a horrible poison.