Water Breathing (Water Only). The beast can breathe only underwater.

Flyby (Air Only). The beast doesn't provoke opportunity attacks when it flies out of an enemy's reach.

Pack Tactics (Land and Water Only). The beast has advantage on an attack roll against a creature if at least one of the beast's allies is within 5 feet of the creature and the ally isn't incapacitated.

Multiattack. The beast makes a number of attacks equal to half this spell's level (rounded down).

Maul. Melee Weapon Attack: your spell attack modifier to hit, reach 5 ft., one target. Hit:1d8 + 4 + summonSpellLevel piercing damage.