Morass dog

"I raised the lantern and whistled softly. The lock is small, black, made in the form of a grinning dog's mouth, in whose throat there was a keyhole. The work of Moras craftsmen. Such a toy would say to any knowledgeable person:" Go away! I'll bite! "
And it did bite! Everyone who couldn't handle it. The cunning Morassians stuffed so many secrets and traps into this thing that only a true master could cope with it. And even then not always. "
"I can handle it," Garrett said simply.
- And if not?
“Then, for a start, the mouth will slam shut, and those adorable razor-sharp teeth will bite off my fingers. Or the lock will spit with a poisonous needle, but in this case I'm not afraid. I will not be in front of him, but behind him. But worst of all, if I am wrong with the last spring. Most often it is made very tough, and if it stops halfway or jumps off, the lock will spit out a certain amount of poison, which in a few ounces turns the lungs into leaky rags. It will be enough for the three of us.
- You are great at explaining, - I coughed.
"Seekers of the Wind" Alexey Pekhov