Argentum

Keen Hearing and Smell. The wolf has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Pack Tactics. The wolf has advantage on attack rolls against a creature if at least one of the wolf's allies is within 5 feet of the creature and the ally isn’t incapacitated.

Construct Nature. Aurum doesn't require air, food, drink, or sleep.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 7 (2d4 + 2) piercing damage. If the target is a creature, it must succeed on a DC 11 Strength saving throw or be knocked prone.

Pounce. Argentum moves up to 30 feet in a straight line and then makes a Claw attack. If the target is Medium or smaller, it must succeed on a DC 14 Strength saving throw or be knocked prone.

As a free action outside combat, Aurum and Argentum can mechanically join together to form a self propelling, gold and silver chariot.