After the encounter in the Destiny 2 Leviathan Raid’s Royal Pools, the Pleasure Gardens and the Gauntlet, your Fireteam will return to the Castellum and must complete the Standard encounter again to open the next door. However, you will no longer be starting on the sun platform. Instead, you will need to complete the Castellum on the hound platform for the Pleasure Gardens, the axes platform for the Gauntlet and the cup platform for Emperor Calus.
If you are unclear on how to complete the Castellum encounter, we already have you covered in our Castellum guide.
Luckily, the encounter does not change, although it does seem like both the adventurers and the defenders will have more enemies to deal with at once. However, it doesn’t get much harder for the adventurers, and collecting the Standards will just take more time. Instead, it is the defenders that get the short end of the stick here. What makes this return difficult is actually the placement of the doors and the cover (or lack thereof) around them, rather than the encounter itself.
Opening the hound door
This section comes right after the Royal Pools and is by far the hardest of the Castellum runs, especially for the defenders.
The hound door is located in the indent on the middle, left side of the room, under the central awning. This pit provides little to no cover for the defenders, meaning that the four remaining members need to play it safe when dealing with the Standard Liberators and other enemies.
If you need cover, you can hide behind some of the nearby walls, but you have to be certain that you have vision of the hound platform, to be sure that nobody is coming to steal a Standard. Titan Barricades are great for this section as you can block enemy vision on a side for a short time.
Opening the axe door
After completing the Pleasure Gardens you are given a nice break with this Castellum, as it is the easiest one in the raid. Located at the bottom of two stair cases, the axe door offers a lot more cover and two easy funnels for the enemies to go through. As a Defender, kill the enemies just like you did on the sun platform earlier, by letting them come to you.
Opening the cup door
After running the Gauntlet, you will return to the Castellum to face the final challenge here. You need to hold the cup platform in order to open the cup door. This is located on the far left side of the room and is about so-so in terms of difficulty. While there is decent cover in this are for Defenders, the main issue comes with how many enemies get thrown at you at once. Stay on the plate and behind the walls, peak out when you can and burst the Standard Liberators with Power weapons and Supers. If your Adventurers go fast, you shouldn’t have a problem here.