Lawrence crumbles back into his swarm form and moves to block the front line of zombies. He nips and bites at the closest, but does little more than distract and slow it down. (Attack roll 3+7=10, miss)
Jorgi flies into the hallway, hovering just above Tarentula. He unleashes a powerful bolt of lightning at the ceiling, causing a few bricks to dislodge and fall among the approaching zombies. It doesn't look too likely that he has the juice to create a whole-sale collapse that he was hoping for...or at least not quickly enough. (Concrete ceiling dmg save roll 21 vs DC22, damaged condition)
Fate, now alone in the chamber overlooking the brawl between Granite and the fungal man, stands and hurls a blast of fire at the nearest tendril. Its becomes blackened and bits of charred tissue flake off, but it seems otherwise unaffected. Luckily, the tendrils no longer seem intent upon swiping at Fate. (Attack roll 13+8=21, hit; dmg save 19 vs DC23, damaged)
Granite does his best to ignore the sting of the head butt and continues to drag the fungal man toward the pile of sodium hydroxide. The two are just beginning to reach the outer edge of the cloud that the alligator stirred up. The fungal man's thick, fibrous skin starts to blister in spots almost immediately. (Opposed grapple check 15+3+12=30 vs 24, success; dragged half move)
The fungal man grits his teeth. The cloud of sodium hydroxide is obviously starting to cause him great pain. He thrashes and twists, frantically trying to break from Granite's grasp. Finally, he manages to slip out of the hold for just a split second. In that moment, a dozen of the large tendrils in the room wrap themselves around the fungal man, effectively sealing him in a tight cocoon. (Opposed grapple check 21 vs 12+3+12=27, fail. Villain point to reroll. New grapple check 30 vs 27, success; escape from grapple.)
In the hallway, the three lead zombies start swinging wildly at Tarentula. They are simply too slow and clumsy to have much chance at connecting with the nimble and ever-shifting swarm. None are within reach of Jorgi yet.