Carl gets about 30 feet from the lawn and gets hit with a blast of cold for 2 points of damage, but fights off any other effects of the cold (rolled Will save 19).
Carl hits on his attack, but the individual blades of grass disperse, so the lawn takes no damage.
The lawn moves into Carl's space, biting for 2 more points of damage. Carl is at 5 HP.
Carl comes to his senses after two more rounds, but takes 1 point each round from hundreds of tiny grass blade cut. Carl missed on each attack. Carl is at 3 HP, and nauseated (natural 1 on Fort save). Because Carl's Constitution goes back down, he loses 4 HP and is at -1 HP and dying.
Next up for NG is a homunculus (MM). Your move, homunculus.
Carl hits on his attack, but the individual blades of grass disperse, so the lawn takes no damage.
The lawn moves into Carl's space, biting for 2 more points of damage. Carl is at 5 HP.
Carl comes to his senses after two more rounds, but takes 1 point each round from hundreds of tiny grass blade cut. Carl missed on each attack. Carl is at 3 HP, and nauseated (natural 1 on Fort save). Because Carl's Constitution goes back down, he loses 4 HP and is at -1 HP and dying.
Next up for NG is a homunculus (MM). Your move, homunculus.