When Bungie introduced masterwork versions of exotic weapons for Destiny 2, they did so with a little twist. Whereas masterwork legendary gear requires a currency called masterwork cores to upgrade, or they can drop as masterworks, exotic masterworks feature a two-pronged system. First, players need to get a catalyst for the exotic and then they need to complete the objective tied to the catalyst to fully unlock the power of the exotic masterwork.

We have already detailed how to find the known exotic catalysts in Destiny 2, but as we mentioned that’s only one part of the equation. And the tasks associated with completing some of these catalysts can be time-consuming, especially for those that require a specific type of kill.

Of the ones that players seem to be having trouble with, the Graviton Lance, Sunshot, and Sweet Business catalyst have proved the most time-consuming. But luckily a new farming method has arrived to help make the grind a little easier.

First players will need to complete the Whispers quest and earn the Whisper of the Worm exotic sniper rifle. Doing so will unlock a heroic version of the Whispers quest, which is tied to a new ship and unlocking the sniper rifle’s catalyst. But that’s not the catalyst we’re focusing on here.

1. Head to Green Room in Whispers Quest

Once you have the Whispers Heroic mission, load it up and head through the majority of the jumping puzzle. Eventually, you will reach the green room, which has blue-colored stone with moss growing all over it. It’s a long room with a giant crack running down the middle of the floor and is about 60% through the mission.

2. Find Shadow Thrall Spawn Underneath

In the green room, jump into the crack into the floor and either to the right or left. There is a floor beneath the crack but it is hard to see until you actually get closer.

After making it under the green room, you should see a bunch of shadow thrall spawn around the area. These shadow thrall will then chase the player to anywhere they move, and killing the group will spawn a new pack.

3. Kill Shadow Thrall in Groups

From here, all you need to do is wait until the shadow thrall group up and kill them with the exotic you want to masterwork. For the Sunshot you need to get explosion kills so let the thrall group up and then explode one, which should trigger multiple explosions. For Graviton Lance kill one thrall and then let the Cosmology explosion kill nearby thrall. Or for Sweet Business, just make sure to get 4 kills in quick succession.

Obviously, with this being a 400 power level mission, the thrall are going to hit hard, so be careful. And there is a time limit so it might require several runs to complete a catalyst. But as far as ways to farm these catalyst kills, there aren’t many solutions that both guarantee no one else will be around and are easy to repeat.

Destiny 2 is available now for PC, PS4, and Xbox One.