The icey blockage served its purpose in freezing the doorframe tighter, though with it being magically bound it would have resisted the creatures' advances as they lacked the keys that would dismiss the protective bindings upon the frame. Asthe hostile and foreign magic spread across the metal frames of the door, 6 glyphs burned like candles as their deadly enchantments were spent. 

The room shook with the force of nearly a dozen dropped conflagrations, each ward on the outside of the door where the monsters had begun to inspect the doorway was filled with biting killing flame magic enough to render every last creature (nearly a dozen in total) into unstirring ashes in a matter of seconds.
Undeterred, more of the horrific creatures would be approaching soon. Attracted to the noise and vibrations through the floor.

On the inside of the office, where the glyphs still shined at the group of eacapees, the protective ice was melting swiftly. Magically being dispelled by the wards glowing around the entire room as they lit up one by one. 
The wardens office was the most secure room in the entire prison and it made sense that someone in his position would have a kings ransom worth of protective measures. 

[b]THUMP[/b].. The glass windows, heavily enchanted, were struck by something heavy from the outside. [b]Thump[/b].. another strike, weaker this time, tested the windows. 
Flying on its horrific insectoid wings was a twisted and deformed corpse mutated into the likeness of a mosquito, the pink flesh and red blood of its previous life dangled on its limbs as it tried to desperately break into the room.

[i]The creatures were outside.[/i] 
More buzzing and scratching was slowly echoing from the sealed and half melted doorway, its killing magic spent. The door itself has been damaged in the assault and will not stop the next wave.

Objective: [u]Armor up and prepare to escape through the stairwell down to the central cells on floor 25.[/u] 
The party is currently on floor 60, Wardens office.