Amethyst's Talking Snakes

Fifteen snake tails: “it looks like she has one tail, but it has a bunch of snakes. It’s made of snakes.” “15 snakes… they wrap around her six bushy tails to form a snake. It looks like she has one tail that’s made of snakes.” Each snake has its own head. The snakes are living, separate creatures but have no end to their tails because they are attached to her. Snake tails grow/retract as long as she wants.
At age six the snakes were added.
The snakes had minds of their own, could talk, and collaborated with Amethyst: “they can talk… they wanted to get out too.” “She didn’t know the power before then, but the snakes showed her because the snakes have a mind of their own, their own separate creatures.”
She escaped on the night she turned seven. “Those snakes can bite through concrete.” The laboratory had not known the snakes could do this.
Snake venom: “can knock out an elephant with one bite… just knock out for a few hours.”
Snakes can squeeze through holes or windows and extend to reach targets: “one of the snakes can squeeze through a hole or a window and find Deathblood.”
Has knocked Deathblood out “a few hundred times” using snake venom, sending snakes through gaps in walls/windows.