Changing from their earlier simple wave tactics, the Undead now began teleporting onto the Great Wall itself, throwing the sectors guarded by several nations into temporary combat chaos. Death Knights charged out of the Gate on Bone Steeds, and the weapon-wielding Undead Creatures following behind them stirred everything into pandemonium; mixed among them were a few Dementors, making the wizards feel their happiness and hope being drained away the moment they drew near.
Fear and despair gripped their hearts, dragging morale even lower, and shouted commands in the languages of various countries rang out above the Great Wall.
Although several of the skull-formed Archways had been successfully blown down by capable nations before the Undead could establish a defensive line, even more of them still had not vanished. The longer the delay, the more Undead poured out, making the Archways stand even more firmly atop the Great Wall.
More and more heavy hoofbeats mingled with chaotic footsteps came from the other side of the Gates, and these Undead Creatures kept breaking into the Great Wall through the Gates in an endless stream.
Meanwhile, at the simple but towering fireplaces built by House-elves with magic, the flames turned emerald green and rose higher than even the Viking Undead—some of these fireplaces had already been successfully connected by the House-elves' Death Eater masters to their own Floo Network, activating the connection.
Some higher-level Undead Creatures that knew how to use Floo Powder, such as Vampires, spun rapidly like tops with the green flames, then stepped across the Fireplace Grates onto the floor tiles of these makeshift fireplaces. These long-prepared Undead Creatures did not hesitate or linger; they lunged cleanly and decisively at the nearby wizards.
The wizards around the fireplace teleportation points did not retreat. Although most of them were not front-line