The "Destiny: Rise of Iron" expansion has reintroduced the Year 3 variation of Thorn Exotic Hand Cannon. For the Rise of Iron expansion, this weapon will only be acquired by finishing the quest A Light in the Dark.
According to KackisHD, a videogame channel for Destiny on YouTube, the actual quest to get the Year 3 Thorn "is relatively straightforward." The author said triggering the A Light in the Dark Quest is just random, which means it may come now or in the months ahead.
How To Get Thorn: Complete A Light In The Dark Quest
To get the year 3 Thorn, here is a step-by-step walkthrough to complete A Light in the Dark Quest:
1. Go to the Tower and talk to Eris Morn who will instruct you to complete The Wretched Eye Strike. Although you can complete it at any Light level, it is recommended to go through it at level 38. After killing the strike boss, next step will be unlocked which is going to Plaguelands.
2. In Plaguelands, you have to kill hundreds of Fallen. To achieve this with ease, do the Archon's Forge events. Once you have killed enough Fallen -- in about three Archon's Forge events -- the next step Feast upon the Light will open.
3. In Feast upon the Light, you have to get around 125 Void Kills in the Crucible. Void kills do not only count those made by weapons. To complete this part quickly, you have to use all Void weapons with the Void sub-class. KackisHD warned that this stage might be "most time-consuming and most frustrating part" of the quest.
4. After completing the previous step, you have to select five models of Light and you're on to the next step.
5. The remade Abomination Heist can be selected directly from the world map. It is recommended to change it to Light level 320.
6. Once the Strike is completed, you can get directly the Year 3 Thorn Exotic hand Cannon out from the chest. This requires a skeleton key. Better save up one beforehand because there's no other way to open that chest.
"Destiny: Rise of Iron" is available on PlayStation 4 and Xbox One platforms.
