Amphibious. If the Form has a swim speed, the Druid can breathe both air and water. Flyby. If the Form has a fly speed, the Druid doesn't provoke opportunity attacks when they fly out of an enemy's reach. Keen Hearing and Smelling. If the Form has no fly or swim speed, the Druid has advantage on Wisdom (Perception) checks that rely on hearing or smelling.
Multiattack. The Druid makes 2 Maul attacks upon reaching 5th level in Druid, 3 Maul attacks at 11th, and 4 Maul attacks at 17th. Maul. Melee Weapon Attack: Your spell attack modifier to hit, reach 5 ft., one target. Hit: 2d6 + Wisdom modifier as piercing or bludgeoning damage (your choice) Dive Attack. If the Druid is flying and dives at least 30 feet straight toward a target and then hits it with a Maul attack, the attack deals an extra 1d6 damage to the target.