Deadly Nadder (5e Creature)
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Large dragon, unaligned
Saving Throws Dex +9, Con +10, Wis +10
Blind Spot. The nadder has disadvantage on any attack roll against a target 5 ft. in front of it.
Tail Spike Regrowth. The nadder has twenty-four tail spikes. Used spikes regrow when the nadder finishes a long rest.
Multiattack. The nadder makes three attacks: two with its bite and one with its tail or three with its tail spikes. The nadder may instead use only one tail spine attack with advantage. While flying, it can use its claws in place of two other attacks.
Bite. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) piercing damage.
Claws. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage. When flying, the nadder may attempt to grapple the target instead of dealing damage.
Tail. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: X (2d10 + 4) slashing damage plus X (7d6 + 6) poison damage and the target must succeed a DC 20 Strength saving throw or be knocked prone. If the nadder runs out of tail spikes, the slashing damage becomes bludgeoning damage and the attack no longer deals poison damage. Instead of dealing damage, the nadder may attempt to grapple the target.
Tail Spike. Ranged Weapon Attack: +14 to hit, range 100/200 ft., one target. Hit: x (2d8 + 3) piercing damage plus X (4d6 + 6) poison damage. If the target is a creature, it must succeed a DC 20 Constitution saving throw, or be stunned for 1 minute.
Fire Breath (Recharges 5-6). The nadder exhales fire in a 15-ft by 5-ft line. Each creature in that area must make a DC 17 Dexterity saving throw, taking 56 (16d6) fire damage on a failed save, or half as much damage on a successful one. Any nonmagical metal objects or structures hit by the nadder's fire breath act as if under affect by the heat metal spell for 1 minute, and creatures wearing any negate this if they succeed the Dexterity save.
Unbridled Fury. In response to being hit by a melee attack, the nadder can make one melee weapon attack with advantage against the attacker.
One of the most beautiful of the lesser draconic creatures, the deadly nadder is a creature that is to be admired. Avian in its posture and baring a wingspan of up to 42 feet, its head is adorned a curved nose horn, a crown of spikes, a beak-shaped overbite, and small but keen eyes, all be it with poor binocular vision. It's painted with vivid colors, while its wings are more molted, and the tail is lined with rows of venomous spines.
Prickly Pretty. In addition to being the most beautiful, nadders are also known as being among the deadliest of lesser draconoids. One factor for this is their intelligence, which is so great some populations even use primitive tools. This is especially dangerous as nadders are also much faster and more agile than most other dragons, both on the ground and in the air.
Dragon Diva. Despite the many dangers involved, nadders are among the most commonly trained dragons in the world, partially due to numbers. As mad as it may sound, a good method to begin train a nadder is to approach it slowly, either from its blind spot to rub its chin or from behind to smooth its tail spikes down. This shows you mean it no harm and are not too dissimilar to it.