The Reaper

The Reaper was an abandoned and retired dragon hunting ship that appears in DreamWorks Dragons: Race to the Edge. It is found in a ship graveyard. It contained the Dragon Eye and also had dragon bones in its cages. The ship has a sail with two daggers symbolizing it. The Reaper is about three times longer than an average Viking ship.

In Race to the Edge
Hiccup and Toothless boarded The Reaper to see what was on board it. They triggered several booby traps as they investigated. They also saw that who ever sailed on it was no friend of dragons due to their cells being filled with Dragon bones. Hiccup then entered the commander's quarters.

There, he found the Dragon Eye. After Hiccup and Toothless escaped, they were then confronted by Dagur and his Berserkers, who put the other Dragon riders in the cages.

Dagur and his Berserkers then raised The Reaper and salvaged it. They took most of the traps and the dragon-proof cages.

Traps
The Reaper has many traps and is described to be ridged with traps from stem to stern. These cages are heavy and large, most probably to store dragons in them. They are resistant to many dragon's fire, even the might Night Fury's Plasma Blast. There are ropes on the ship's deck that coil around invader's feet and attempt to quickly pull them off-board into the water. There are huge, metal Bear Traps with razor sharp teeth. When one steps on a particular floor board, it triggers numerous crossbows on the wall to emerge and fire rapidly and the opponent. Also, arrows are launched after the Dragon Eye is removed from the head quarters. A large axe automatically swoops down onto where the Dragon Eye's initial position was when it is removed. After the axe is launched down, the sharp spikes jut out from the floor between where the Dragon Eye was and the door.
 * Dragon Proof Cages
 * Ropes
 * Bear Traps
 * Arrows
 * Axe
 * Spikes on the floor

Trivia

 * The Reaper has the same sail as the abandoned ship on Icestorm Island in School of Dragons.
 * Due to the caged dragon skeletons and dragon-proof traps, it is possible The Reaper was part of Drago Bludvist's armada. The ship's design is also similar to Drago's main ship.
 * But if this is the case, Drago may have had dragon-proof traps, in How to Train Your Dragon 2, the traps were able to break. Or it could have been that Drago abandoned The Reaper, or lost it in some way, but all the dragon-proof weapons still remained on that ship.