Charge. If the cow moves at least 10 feet straight toward a target and then hits it with a gore attack on the same turn, the target takes an extra 9 (2d8) piercing damage. If the target is a creature, it must succeed on a DC 14 Strength saving throw or be pushed up to 10 feet away and knocked prone.
Modified Muscles. Melee Weapon Attack: your spell attack modifier to hit, reach 5 ft., one target you can see. Hit: 1d8 + PB damage.
Cow Pie. The cow expends 5 ft. of movement and produces a steaming cow pie at its current location. After walking forward 5ft, this also creates a 5 foot cube of methane gas at its new location. This cube lingers for 1 turn before dispersing.
Opportunity Attack. Genetically Modified Cow can make an opportunity attack when a hostile creature that it can see moves out of its reach. To make the opportunity attack, use the cow's reaction to make one melee attack against the provoking creature. The attack occurs right before the creature leaves its reach.