Monster Manual (5e), Van Richten's Guide to Ravenloft (3.5e)
Dread Harvest. The tree has 5 (2d6) death's heads within its branches, disguised as vaguely head shaped fruit. If disturbed, the death's heads detach from the tree to attack any hostile creatures.
False Appearance. While the tree remains motionless, it is indistinguishable from a normal tree.
Slam. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 14 (3d6 + 4) bludgeoning damage.
Forest, Hill, Swamp