Lightning Absorption. Whenever the shambling mound totem is subjected to lightning damage, it takes no damage and regains a number of hit points equal to the lightning damage dealt.
Multiattack. The shambling mound totem makes two slam attacks. If both attacks hit a Medium or smaller target, the target is grappled (escape DC 14), and the shambling mound totem uses its Engulf on it.
Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit:13 (2d8 + 4) bludgeoning damage.
Engulf. The shambling mound totem engulfs a Medium or smaller creature grappled by it. The engulfed target is blinded, restrained, and unable to breathe, and it must succeed on a DC 14 Constitution saving throw at the start of each of the mound's turns or take 13 (2d8 + 4) bludgeoning damage. If the mound moves, the engulfed target moves with it. The mound can have only one creature engulfed at a time.
Elementals are an even more primal embodiment of natural forces. They are living beings of raw natural energy, but magic can shape and bind them into physical forms composed of wind, water, fire, or the verdant growth of the forest. The River Heralds construct jade totems that hold elementals in stasis until activated by trespassers. When a totem opens, the elemental's physical form comes together, and the intruders are quickly dispatched.