Destiny 2 Lightfall: How to Complete Headlong Quest and Solve Vex Puzzles

Learn the solution to the Harpy door puzzle in this guide to the Headlong mission in Destiny 2 Lightfall.

Learn the solution to the Harpy door puzzle in this guide to the Headlong mission in Destiny 2 Lightfall.

Unlike the Witch Queen campaign, the Destiny 2 Lightfall story is a little light on Raid or Dungeon-style encounters and puzzles, but there is one that takes a little thinking to overcome. The second-to-last mission, Headlong, has several doorways blocked by Vex energy, and you’ll have to solve a quick but cumbersome Vex puzzle to open them. The last encounter of the mission is also a doozy, so we’ll cover that here as well.

Other Destiny 2 Lightfall coverage:

How to Complete Headlong Mission and Solve Vex Puzzles in Destiny 2 Lightfall

Most of the Headlong mission is straightforward. Defeat enemies, keep learning how to use Strand, and don’t die a lot. The two caveats are the Vex door puzzles and the final encounter.

The Vex puzzles are actually very easy. When you arrive at a blocked path, clear the enemies waiting near it. Then several orange-bar Harpies will spawn. One set will be glowing — Cation Harpies — and the other set will not be: these are Anion Harpies.

Screenshot by GameSkinny

There will also be three glowing crystals above the blocked path. You need to defeat the Harpies in the correct order to fully open the way. The order is present in the brightness of the crystals.

Bright ones mean you shoot Cation—dark ones, Anion. So start shooting each Harpy in order, then look to the bottom left of your screen. If you shoot the right one, you’ll see a message that says, “Vex input accepted!”

If you got it wrong, either because you made a mistake or some weapon or ability effect killed the wrong Harpy, you’ll get the message “Vex input error. Resetting Vex lock.” At that point, you’ll have to start the whole process over again.

You’ll solve this Vex door puzzle three times throughout Headlong, with one additional Harpy needed each time. We recommend using a primary weapon that doesn’t cause explosions or damage-over-time effects, as these can lead to unplanned resets.

When you reach the last section of Headlong, where you’re in a small arena with a rotating laser wall, you’ll need to defeat four waves of Vex enemies and then a large Minotaur boss. We don’t recommend using your Super here if you’re a Titan or Hunter, as exploding Fanatics will appear during the boss phase.

Use a Grenade Launcher or Rocket Launcher like Anarchy or Gjallarhorn to clear masses of enemies at once and constantly stay on the move. Use the free Strand grapple points to keep mobile, and equip Sniper Resistance mods to alleviate the constant Hobgoblin spam. The less time you spend on the ground in this room, the better. Beware that the laser wall’s backside hitbox is larger than expected, so stay a further distance from it.

Once you complete Headlong, there’s just one mission left in the Lightfall campaign, and with that done, you’ll have total access to Strand and can start unlocking its full potential. If you want even more coverage of the Lightfall expansion or Destiny 2 in general, check out our guides hub.

Featured image via Bungie

About the author

John Schutt

John Schutt has been playing games for almost 25 years, starting with Super Mario 64 and progressing to every genre under the sun. He spent almost 4 years writing for strategy and satire site TopTierTactics under the moniker Xiant, and somehow managed to find time to get an MFA in Creative Writing in between all the gaming. His specialty is action games, but his first love will always be the RPG. Oh, and his avatar is, was, and will always be a squirrel, a trend he's carried as long as he's had a Steam account, and for some time before that.