Giant Tortoise (5e Creature)
From D&D Wiki
Large beast, unaligned
Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 5) bludgeoning damage.
Tortoiseshell. The giant tortoise withdraws its head and legs into its shell. While withdrawn, the giant tortoise cannot move or take any actions but gains a +4 bonus to AC. It can end this effect as a bonus action.
The mighty giant tortoise is a placid creature of immense strength and hardiness. Growing to the size of a small elephant and protected by a sturdy shell, it slowly roams and munches on greens.