SCP-1499 is to be kept in a locked box guarded by two agents at any point in time.
Any? All right, I choose 6:39pm on December 18th, 1892. "At all times" would be better.
Also, maybe I'm just burnt out on weird too-tall humanoid monsters, but they're not doing it for me here. (The fact that it's a Soviet gas mask for no apparent reason doesn't help, either. Why's everybody love those Soviet gas masks so much?)