Brolem

Weather Proof. The golem is immune to damage caused by the environment and difficult terrain.

Missionary of Swole. If the golem goes more than a day without a workout partner, it will seek one. After finding the nearest able person or creature it chases and attempts to restrain them until they surrender to an exercise of the golem's choosing. One hour of moderate to intense exercise is needed to sate the golem, after which the golem will move on unless Satisfaction occurs.

Satisfaction. After a partner completes an intense workout, they suffer 1 point of Exhaustion and the golem magnificently poses to display its satisfaction. If that partner can manage the same pose with a DC 14 Performance check, the golem will consider that partner a Bro and will complete simple requests for them as long as they complete an intense workout daily.

Immutable Form. The golem is immune to any spell or effect that would alter its form. 

Magic Resistance. The golem has advantage on saving throws against spells and other magical effects.

Push Me. A character that spends at least one continuous month as the golem's Bro gains proficiency in Athletics or Performance. A character may only benefit from this feature once.

Grapple. The golem can make a grapple attack and has advantage if it is an opportunity attack, ignoring abilities and features that nullify opportunity attacks.

Hype. When the golem's Bro is within 60 feet and makes a Strength skill check or Strength saving throw the golem can unleash a thunderous bellow, granting one Brolem Inspiration die for that roll, a d8. This reaction cannot be used again until the golem completes a short rest.