Blood Drain. Once per turn after hitting a creature with a melee weapon attack, the treant's branches & roots can consume some of the target's blood. The creature takes an additional 10 (3d6) necrotic damage. The target's hit point maximum is reduced by an amount equal to the necrotic damage taken, & the treant regains hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0.

False Appearance. While the treant remains motionless, it is indistinguishable from a normal tree.

Siege Monster. The treant deals double damage to objects and structures.

Trample. If the treant moves at least 30' in a straight line, any creatures or objects in its path must succeed on a DC 17 Dexterity saving throw or take 12 (1d6 + 9) bludgeoning damage. On a success, the creature takes only half damage.