ElDradimon

ElDradimon is a massive Digimon that resembles a turtle. He is, in fact, the Sacred City of the Digital World, in that he carries an entire city of Digimon on his back. Ultimately, he came under attack from Kurata's forces, and was sent to the real world, where Marcus and the others failed to protect him, resulting in his being impaled and destroyed by a massive lance created by way of merging numerous Gizumon together with a weapon.