Destiny 2 Season of the Seraph has introduced a new exotic pulse rifle, Revision Zero, via the quest Operation: Seraph's Shield. Since then, Bungie has also added a series of new exotic quests called "Should You Choose to Accept It" to unlock catalysts for Revision Zero.
Now, week 6 of Season of the Seraph has introduced part 3 of the "Should You Choose to Accept It" exotic quest. Here's how you can complete it.
Destiny 2 "Should You Choose to Accept It Part III" exotic quest guide
There are six steps in the "Should You Choose to Accept It III" exotic quest in Season of the Seraph.
Step 1: Return to the Archimedes Annex and download a Cryptographic Index

Similar to Parts 1 and 2, you would have to return to Archimedes Annex and download a Cryptographic Index. To do so, complete the Warmind Launch Facility activity from the H.E.L.M. It's pretty straightforward. Go to a location, kill everything, and collect the data at the end.
Step 2: Travel to the EDZ

The simplest step in this quest involves landing on the EDZ and waiting for step 3 to begin.
Step 3: Complete Patrols and defeat combatants in the EDZ
To unlock the password for the cipher you got in step 1, you have to complete patrols and defeat enemies in the EDZ.
Step 4: Locate the dead drop in the Terminus East lost sector
The Terminus East lost sector is east of the Trostland landing zone in the EDZ. You will find the dead drop next to the final chest in the lost sector.
Step 5: Recover Weapon Schematic in Operation: Seraph's Shield (Legend difficulty)

The fifth step involves hunting for a weapon schematic in the Operation: Seraph's Shield exotic quest at legend difficulty. You will find it on top of a dead Exo frame in a small room next to the Haroktha boss.
Step 6: Complete Operation: Seraph's Shield on Legend difficulty
The sixth and final step asks you to complete Operation: Seraph's Shield on Legend difficulty, which means defeating Praksis again.
And that's it! Completing this will get you the Outlaw Refit catalyst for Revision Zero.
That concludes our guide on how to complete "Should You Choose to Accept It III" in Destiny 2.
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