Lucario (5e Creature)
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Medium elemental, any alignment
Aura Sight. The lucario can sense the presence and location of any creature within 300 feet of it that has a Charisma of 3 or higher, regardless of interposing barriers, unless the creature is protected by a mind blank spell.
Steadfast (Recharges after a Short or Long Rest). If the lucario takes 21 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead.
Justified. If the lucario take 30 or more damage on one turn, it has advantage on all attack rolls until the end of its next turn.
Inner Focus. The lucario has advantage on saving throws against being charmed or frightened.
Multiattack. The lucario makes one Aura Sphere attack and one Metal Claw attack.
Aura Sphere. Ranged Weapon Attack: +5 to hit, range 15 ft., one target. Hit: 15 (3d6 + 5) force damage.
Metal Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage.
A lucario is a type of steel elemental that can sense the auras of nearby creatures. It uses its own aura to empower its fighting spirit and lead it to victory.