Scene depicted from a collab story - http://www.fimfiction.net/story/214973/where-is-my-love
 
Taking a deep breath, Deadeye returned Dark Star’s charge, the shadow- claws tearing fur and skin from Deadeye even as he pressed forward. Deadeye was light headed as he entered the area in front of his uncle which the shadow-claws had been ignoring, and that is when he took his chance.
 
Baring his fangs with a snarl, Deadeye sunk them into Dark Star’s throat, holding on even as the elder stallion returned to his normal state and began to thrash about, kicking and punching his nephew in desperation.