False Appearance. While the tree remains motionless, it is indistinguishable from a normal tree. The species of the tree matches that of the wood that was used to make the stake. For instance, if the stake was made from Ash, the tree will be an Ash tree. If the stake was oaken, the tree will be Oak.

Cutting. A cutting taken from the Gulthias tree can be planted in ground soaked with blood. The cutting will grow into another Gulthias tree identical to the first, but it will have an additional vulnerability. If the parent tree is destroyed, the cutting dies as well.

Multiattack: Whip x 2, Rock

Whip. Melee Weapon Attack: +11, reach 20 ft., one target. Hit 14  (3d6 + 5) slashing damage. After a successful attack on an opponent with a whip attack, the tree may drain the victim for 9 (3d6) points of necrotic damage. If the victim succeeds at a dexterity save (DC 16), they only take half damage. The tree gains the hit points drained.

Rock. Ranged Weapon Attack: +5, range 60/180 ft., one target. Hit: 25 (4d10 + 5)

Awaken Tree (1/day): The Gulthias Tree magically animates one or two trees it can see within 120 feet of it. These trees have the same characteristics as an awakened tree, except it has an intelligence of 4 and is under the control of the Gulthias tree.

If struck by an Axe, the Gulthias may hit back immediately with a Whip attack.

The gulthias tree may take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. The gulthias tree regains spent legendary actions at the start of its turn.

Summon Blight - The tree may summon 1 tree blight, 1 vine blight, 2 needle blights,  4 needle blights, or 8 twig blights. (Choose randomly.)

Entangle - The Gulthias tree may cast the spell Entangle.

Charm - The tree may charm a single target. DC 17.