C114 The Effect of the Spinning Staircase for the Harvesting of Life(1)

"Damn it! Where did they get such powerful explosive firepower?" Zhou Dong bellowed. His mechanical cannon packed a punch equal to the enemy's, but the "pressure grenade" was a weapon anyone could wield. With over ten people guarding the staircase and taking turns lobbing grenades down, they had effectively blocked every attempt to advance