|The title of this article is conjecture based on information revealed in the A Song of Ice and Fire novels or related material and may be subject to change.
Prince Joffrey Baratheon and Sansa Stark come across Sansa's younger sister Arya Stark and her friend Mycah playing at swordfighting with sticks. Joffrey proceeds to threaten Mycah with Lion's Tooth, cutting his cheek with it. Ayra strikes Joffrey in Mycah's defense, and Joffrey turns on her, slashing at her with the sword. Nymeria attacks Joffrey in Arya's defense, causing him to drop Lion's Tooth. Ayra picks it up and, after holding it to Joffrey's wimpering face, tosses it into the Trident. The sword is never recovered.
In the novels
The sword is never recovered.
Later, in the third novel, Arya Stark inaccurately remembers the name of Joffrey's sword as "Lion's Paw" instead of "Lion's Tooth". George R.R. Martin has stated that he intended this mistake in-universe (it wasn't a typographical error), one of his points highlighting that the characters' memories are not infallible.