Kaeozzoidian Trained Dragon (5e Equipment)
From D&D Wiki
Cost: 3000 gp
ACTIONS bite, melee weapon attack, plus 15 to hit, reach 10 ft, one target, deals 2d10 plus 9 piercing plus 3d6 fire damage on a hit. tail, melee weapon attack, plus 15 to hit, one target, 2d8 plus 9 bludgeoning damage. lave breath (recharge 6), the dragon exhales lava in a 5ft by 120ft line, each creature in the line must make a dc21 dex saving throw, taking 20d6 fire damage on a hailed save, and half as much on a successful one, and on a failed first save must make a con save or a dex save at the start of each of its turns with dc 17 or take 3d4 fire damage on a failed save, and end this effect on a successful one, this effect ends automatically after 30 seconds
REACTIONS clawed opportunity attack, the dragon makes a claw attack(see legendary actions) when a creature moves from 5 feet away from it, to 10 or more feet away from it. and the other reaction is it can increase its ac by 3 until the end of the turn when it is targeted with an attack, this ac bonus only applies to the attacker, and its ac is reduced by 3 against any attack made by another creature that turn, it can take this reaction once per 2 rounds, though it still regains its reaction normally, it can only do clawed opportunity attacks for that round cycle.
LEGENDARY ACTIONS claw attack, the dragon makes an attack with its claws, plus 15 to hit, one target, range of 5ft it deals 2d6 plus 9 slashing damage on a hit. multi attack(3 actions) the dragon makes 2 claw attacks followed by using the bite action once as part of this action.The kaeozzoidian dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The kaeozzoidian dragon regains spent legendary actions at the start of its turn.
it has 22 ac in natural armor, 375 hit points, 28 str, 14 dex, 22 con, 2 int, 13 wis, 16 cha, and immunity to fire. it also has proficiency in con saves with +11, dex saves with +7, wis saves with +6, and cha saves with +8. it even has + 11 to perception, passive perception 21, darkvision 60ft, and cr of 18. it has a flying speed of 100