They were not the only ones dumbfounded. Even Mu You, who had created the ice wall, had never expected the Ice Wall Spell to be so outrageously effective!
By then, he had naturally received support from Leo, Virgo, and the others. He had gone to the edge of the barrier and cast the defensive black magic from Virgo's Crystal: Ice Wall Spell.
[Ice Wall Spell: Intermediate ice-type black magic. Condenses an indestructible wall of ice before the caster, blocking units from passing through. Any creature that comes into close contact with the ice wall will be frozen. The wall's length and height depend on the magic power supplied.]
There was actually little remarkable about this black magic. All it did was create an ice wall to block passage, and the wall did not even restrict teleportation abilities.
However, their current surroundings were rather unusual. Spatial interference rendered all teleportation spells ineffective, so the Black-Robed Men could only get into the barrier by going around the ice wall, either from the sides or overhead.
That detour was where things went wrong.
Mu You had not expected the wall to be this effective either. He promptly poured in more magic power, draining almost ninety percent of the magic power from the six people's Crystals.
With such an enormous supply of natural magic power, the ice wall instantly stretched into a rampart over five kilometers long.
The Black-Robed Men opposite him had barely run a few steps before they were utterly dumbfounded. The ice wall extended at tremendous speed toward the distant, indistinct horizon of the swamp. By the time they got all the way out there and circled back, it would be far too late!
Besides, how could the players pursuing them give them that chance?
**"Everyone, hold them back