Baby Brontosaurus

This baby brontosaurus has 2 healthbars. When it dies, it becomes enraged, gaining a second healthbar with 1.5x the first one. In its enraged state it will get 2 actions per turn, and advantage on its stomp attack.

Stomp. Melee Weapon Attack: +4 to hit, reach 20 ft., 5 target. Hit:  5(1d6 + 2) bludgeoning damage. 

Tail. Ranged Weapon Attack: +3 to hit, range 30/120 ft., 1 target. Hit: 6 (1d8 + 1) bludgeoning damage.

Charge the Backline. Baby Brontosaurus dashes up to 100 feet, dealing 1d4 damage to all it collides into. It can use Stomp during this and deal 1d6+2 damage instead

Trample (Costs 2 Actions). Melee Weapon Attack: +4 to hit, reach 20 ft., 5 target. Hit:  9(2d6 + 3) bludgeoning damage. This attack also stuns for 1 turn