A Death Mauler using Ground Tentacles.
Ground Tentacle is a ranged monster skill used by the Death Mauler class monsters.
The Death Maulers will thrust their hands downward and project their tentacles into the earth through which they will quickly burrow toward the target before shooting up in two deadly spikes. Moving dirt mounds can be seen as the tentacles travel, giving advance warning of their approach.
In groups, these spikes can be quite devastating, so it is best to destroy the monsters as quickly as possible. As the tentacles will not change target after they have been injected into the terrain, it is also wise to avoid remaining in the same place for very long while fighting these creatures (if they are in view, you should move only after they begin leaning over to use this skill, as at that point, the target is locked).
In Diablo Immortal, it is used by Heralds of Pestilence.
Damaging Skills
Fire — Embers • Eruption • Fire Arrow • Fireball • Fire Bolt • Fire Hit • Firestorm • Fire Wall • Flame Circle • Grenade • Hydra • Incinerate • Incineration Nova • Inferno • Meteor • Minefield
Ice — Arctic Blast • Blizzard • Cold Touch • Fire Hit (Cold) • Freezing Charge • Glacial Spike • Hoarfrost
Poison — Poison Bolt • Poison Breath • Poison Cloud • Poison Spit • Poison Spray • Poison Sting • Poison Strike
Lightning — Lightning • Lightning Arrow • Lightning Globe • Lightning Storm • Red Lightning Hose • Shocking Hit • Spark Defense • Thunderbolt
Physical — Bite • Blast Wave • Blow Dart • Charge (Berserk Charge) • Cleave • Corpse Cannon • Destructive Strike • Divebomb • Grab • Ground Spikes • Ground Tentacle • Leap • Javelin • Leech-life Ball • Pummel •Quake • Quill Dart • Slam • Snatch • Spine Dart • Strike • Swipe • Sweep • Whirlwind
Magic — Beam • Blade Beam • Blast • Bomb • Bone Spirit • Cataclysm • Hellish Projectile • Nova • Tide • Tornado • Torrent • Unholy Bolt
Non-damaging Skills
Indirect Attack — Blood Mana • Curses • Mana Rift • Minion Frenzy • Putrify • Spin Web • Stun • Vortex
Spawning — Bone Prison • Festering Appendages • Lay Egg • Minefield • Mystifying Growth • Revive • Summon Minion • Totem
Self-effect — Bone Armor • Burrow • Effigy • Fly • Frenzy • Heal • Shell • Teleport • Vile Effigy