Eret first used one of his swords while confronting Hiccup and Astrid at his fort, using them to gesture with and threaten the two. As he bowed to them, mockingly introducing himself, Eret slipped a hand behind his back and drew out one of his swords, as seen in the picture to the right. However, before he could use them, Toothless destroyed the fort, and the two Riders made their escape.
Later, when Hiccup and Astrid arrive on Eret's Ship, he points one of his swords at them, thinking he will capture them. Much to his surprise, Hiccup surrenders, so Eret doesn't need to use his sword, again.
At Drago's location, when the riders are found by Drago's men, Eret takes both his swords out to defend himself. However, due to being outnumbered, the riders surrender.
Eret's swords are fairly small, and the two differ slightly in appearance. One of them is a bit round at the middle, but sharp at blade. The other one looks like normal sword, sharpened to a fine point. They are both steel in coloration, and have short hilts and crossguards.
- The curbed sword resembles Sting, the sword Bilbo uses in The Hobbit films and Frodo in The Lord of the Rings films, all which are part of the Middle Earth franchise.