Proficiency Bonus (PB): equals your bonus
Charge: If the beast moves at least 20 feet straight toward a target and then hits it with a maul attack on the same turn, the target takes an extra ld6 slashing damage. If the target is a creature, it must succeed on a Strength saving throw against your spell save DC or be knocked prone.
Primal Bond: You can add your proficiency bonus to any ability check or saving throw that the beast makes.