Warriors of Earth

The Warriors of Earth are AncientVolcamon and his legacy, those Digimon whose forms the users of the Spirits of Earth he left behind can take. Those who use the Spirits of Earth have the ability to combine with each other or with Spirits of other elements, becoming even more powerful.

AncientVolcamon
AncientVolcamon is an Ancient Mineral Digimon whose name and design are derived from "Ancient" and "Volcano". It possesses the attribute of "Earth", and is one of the legendary Ancient Warriors that saved the ancient Digital World. It is the most powerful of the Ancient Digimon, due to the high temperature of the boiling magma within its body. Its abilities were given to the "Ore" and "Mineral" types of Rock Digimon.

Digimon Xros Wars
AncientVolcamon is the commander of the Bagura Army group stationed in the Magma Zone. He has a berserker personality prone to raging, so its subordinate SkullMeramon tries to keep him cooled down with some Frigimon. When AncientVolcamon learns of Xros Heart's meddling in his domain, he personally confronts them.

Attacks
 * Atomic Bomber: Detonates the volcano on his back, which propels him into a super-strong lariat.
 * Supernova: Generates antimatter within his body, which causes a super-detonation comparable to a tiny Big Bang.

Grumblemon
Grumblemon is a Champion-class Hybrid Digimon. He is the Legendary Human Warrior of Earth, using the power of AncientVolcamon. His Japanese name is Grottomon.

Grumblemon wears his handmade "Rot Armor" on his body and wields the "Grotto Hammer". He can also dig through solid rock and open a bottle that releases smoke which can summon Golemon to his command.

Digimon Frontier
Attacks
 * Snake Eye Break: He turns his enemies into stone and uses his hammer to destroy them.
 * Jack in the Box: Leaps out of the ground and attacks with his hammer.
 * Seismic Sledge: Pulls a hammer out of the ground or his armor which he uses to crush his enemies as well as to make the earth crack. The hammer can extend on command.

Gigasmon
Gigasmon is an Ultimate-class Hybrid Digimon. He is the Legendary Beast Warrior of Earth, using the power of AncientVolcamon. His name comes from "gigas", the Greek word for giant.

Digimon Frontier
Attacks
 * Quagmire Twister (Hurricane Bomber): Spins around like a tornado.
 * Tectonic Slam (Earthquake): Leaps above the ground and makes a ground-shaking landing.
 * Giga Storm: Releases a sand storm from his mouth.