**The Command Spire and Repository: both skulls and the route through**

**The Command Spire and Repository: both skulls and the route through** *Late-campaign mission spoilers below.* The two things worth knowing before this stretch are simple: the bright energy column at the start is not a lift, and Repository's skull needs preparation long before you reach its room. Handle those two details and you avoid the most annoying repeat trips. **Command Spire: climb around the energy, not through it** Clear the opening Sentinels and activate the terminal. Grapple up the platforms with blue-lit edges, staying out of the damaging energy beam. At the upper section, retrieve the power seed opposite the lift socket, deal with the arriving Sentinels and insert the seed. Ride the powered lift, restock, then fight through the circular passages to the teleporter. Continue through the manufacturing rooms and take the next lift. You will reach a larger production area where the enormous columns move horizontally. Stop here for Mythic before using the next teleporter. [Opening route](https://t.co/YsDg1PGQHf) On Normal, take a moment to learn which surfaces are stable before chaining grapples. On Heroic, clear the nearby shooters before crossing a gap. On Legendary, do not turn a traversal section into an airborne firefight unless you have no choice. A safe landing with a full shield is worth more than a few shots fired while swinging. **Mythic skull: above the turning columns** Follow the horizontal production line to the point where the columns turn right. Grapple onto one of those columns, turn back and grapple onto the ledge above. From there, reach the higher protruding platform at the square opening in the ceiling. Enter the hidden doorway and follow the corridor to the skull. [Mythic landmarks](https://t.co/364YzwHFCF) Clear the room first. The climb is much easier to judge when nobody is knocking your shields down. If a grapple does not reach, reposition on a secure surface instead of repeatedly jumping from the same bad spot. Once the skull is collected, return to the ordinary route and take the portal onward. The Command Spire has no audio-log pickup to search for alongside Mythic. **Adjutant Resolution, round two** Grapple onto the central arena platform to begin the second encounter. The basic pattern remains: destroy a gun arm, attack the exposed core during the stun and repeat. This time Sentinels join the fight, and some pillar cover can retract. Keep checking the room rather than trusting one pillar for the entire battle. [Second encounter changes](https://t.co/xQktEhBkAA) Treat an arriving Sentinel as an immediate decision, not background noise. If it can shoot around your cover, remove it before resuming the boss. On Normal you can recover from a missed opportunity; on Heroic and Legendary, unchecked side fire is often what makes an otherwise familiar boss pattern fall apart. Keep a second shelter in mind. If your current pillar starts disappearing, leave before the machine has a clear firing line. Reload behind protection so your weapon is ready when an arm breaks. During the final central-beam pressure, patience is preferable to standing exposed for one more burst. After winning, ride the central lift to the observation platform. Clear the defenders and the three arriving Phantoms, using the heavy weapons and ammunition available near the terminal. Then interact with the controls to finish the shutdown sequence. [Observation-platform finale](https://t.co/xQktEhBkAA) **Repository: do the skull setup immediately** Cross the opening bridges, defeat the Sentinels and reach the central information-relay console. Use it and clear the response. Before following the newly opened main route, prepare the optional skull room. Stand facing the relay from the entrance approach. Grapple to the newly unlocked side door on the right and retrieve the power seed. Carry or carefully throw it back across the safe platforms to the room on the opposite side. Insert it into the receiver in that room's back-right corner. Then return to the main route. This powers a barrier much farther into the mission; it does not drop a skull at your feet. [Skull preparation](https://t.co/DokbwTD39e) If Sentinels interrupt the crossing, put the seed on a safe platform and fight. Do not throw it blindly while trying to aim at an enemy. You have time to make the transfer deliberately. **Grunt Birthday Party: the elevated room with four cloaked guards** After the window conversation, follow either ascending side path to the next combat chambers. Before the later two-seed lift puzzle, watch for the symmetrical chamber with golden architectural panels and a high opening in the wall above two large supports. Your earlier seed transfer removes the barrier there. Grapple into that opening; the skull is on the floor inside, guarded by four camouflaged sword Elites. [Skull room](https://t.co/DokbwTD39e) Have a Threat Sensor and loaded weapons ready before entering. Find one target and finish it while keeping space from the others. Grenades help disrupt a clustered approach, but do not throw explosives at your own feet because the first Elite surprised you. On Legendary, losing sight of one attacker is a reason to move, not a reason to stand still aiming at the skull. Collect the skull and return to the normal passage. Continue through the following side routes, regrouping corridor and first lift before reaching the later two-seed hub. There is no named boss at the end of Repository, but its regular heavy enemies still deserve the same respect as the earlier boss rooms. **Reach the surface through the lift-and-seed rooms** Follow the objective through the interior battles and lift sequence. At the hub with two unpowered lift sockets, use the side routes to find the required power seeds. Clear the guards in each branch, collect the seed and use the return teleporters to get back to the hub. Both sockets must be filled before you can proceed up the lift. Continue through the story scene and the remaining combat rooms toward the surface. [Repository objective route](https://t.co/TNj8maFrXI) The larger branch fights are best handled from a position where you can back out. Do not run deep into a room simply because the seed marker is visible at the far end. Clear the heavy enemy controlling that space, then advance. If multiple Chieftains are firing, focus one instead of distributing your damage evenly and leaving every gun active. On Heroic, bring enough ammunition to finish the first heavy target without an emergency scavenging trip. On Legendary, control the doorway and the nearby flank before moving forward. Weapon racks are useful only if you can reach them alive. **Repository's two audio logs** **The Weapon** is an automatic Recovered File unlocked through the late story progression. Watch for the decoding message and confirm it in the Database. **The Prisoner 06 — Price Paid** is the physical UNSC pad. After the late lockdown story scene and enemy response, take the left-hand branch to the storage/control room near the end of the escape route. Find the Banished table displaying a small red hologram of the ring; the pad is on the table beside that hologram. Do not leave through the surface route without checking it. [Audio-log landmarks](https://t.co/DokbwTD39e) At the end, the collection accounting is one skull in Command Spire, then one skull and two logs in Repository. The optional seed puzzle is the one step you must deliberately do early; the remaining pickups are reached during normal progression.