AncientGreymon

AncientGreymon is a fictional character from the Digimon franchise. He is an Ancient Dragon Digimon with the power over fire. He was one of the Ten Ancient Warriors who saved the ancient Digital World from Lucemon's treachery. In this battle, he and AncientGarurumon endured until the very end. Prior to the said battle, he & AnicentGarurumon fought another monster, Ornismon & sealed it. The power AncientGreymon possessed now lives on in Takuya, who wields the Spirits of Fire created by AncientGreymon.

Digivolution
AncientGreymon was never given a precise evolution line in the anime. In the card game, however, he may evolve from WarGreymon or MetalGreymon.

Attacks

 * Omega Corona (Omega Burst): A huge burst of flaming energy is released from his armor and then surrounds everything around it.'''
 * Gaia Tornado: a powerful fire blast is released from his mouth and destroys anything in its path.'''

Digimon Frontier
AncientGreymon was one of the ancient Digimon that fought and sealed away Lucemon.

Island of Lost Digimon
Bearmon's prayer allowed both the Spirits of Fire and the Spirits of Light to become AncientGreymon and AncientGarurumon to fight Ornismon.

Digimon Battle Spirit 2
In the Gameboy Advance game Digimon Battle Spirit 2, AncientGreymon appears as a "finishing" move for Agunimon. If Agunimon fills up his power meter, he can warp digivolve into AncientGreymon, and fire a massive fireball at his opponents.