Watching the countless bat monsters continuously converging towards this side, Dong Tianyu was genuinely excited at this moment.
Although he was the only one defending this place, the individual strength of those bat monsters wasn't strong, so even if there was a great number of them, they were still akin to ants to Dong Tianyu.
In facing these ants, Dong Tianyu had already prepared his response method. It is known that blocking the Plane Transmission Channel only utilized the White Bone Banner, and Dong Tianyu still had the Hundred Ghosts Banner and Bloodthirsty Banner left unused.
Dong Tianyu had long wanted to upgrade the Three Flags, and to upgrade them, besides directly utilizing Heavenly Materials and Earthly Treasures for refinement, another method was to use a large number of living spirits as materials for their upgrade.
