Aurum the Lucario

Metallic Resistance. Aurum takes only half damage from plant-based attacks and attacks from creatures with the Dragon type, and takes quarter damage from attacks from insect-like creatures and stone-based attacks.

Metallic Weakness. Aurum is vulnerable to magical bludgeoning damage.

Erosion. Aurum takes double damage from dirt- and sand-based attacks.

Aura Sphere. Ranged Spell Attack: Always hits, range 30 ft., one target. Hit: 8 (1d12 + 2) force damage. 

Detect. The next attack directed at Aurum automatically misses.

Heal Pulse. One ally of Aurum's choice regains hit points until it is at half its hit point maximum.

Close Combat. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 12 (2d8 + 4) magical bludgeoning damage, and the next attack roll made by the target against Aurum has advantage.