Steam Tank Obsidian is the final boss of Partitio’s Chapter 4 in Octapath Traveler 2, which crosses your path in Rogue Island. The tricky bit about this Steam Tank is that its parts continue regenerating health, so you need to be swift with the moves.
The boss has two physical weaknesses, Polearm and Bow, and one elemental weakness, Darkness. To overcome this boss easily, you need to understand the weak point of each component and take it down quickly before the steam engine appears in Octopath Traveler 2.
Where to Find Steam Tank Obsidian?
You will encounter the Obsidian boss in the ending stages of Partitio’s Chapter 4. You need to head to the Rogue Island Headquarters on Harborland,
You will board your ship and head over to Roque’s place. As you dock, head west to reach the gates. At that point, a cutscene shows Roque and his Tank initiating the fight.
How to defeat Steam Tank Obsidian in Octopath Traveler 2?
This is a long and tricky boss fight; therefore, you must restore your HP continuously during the fight, either by having a healer in your party, healing grapes, or energized pomegranates. It’s good to have a few Olives of Life for revives.
The Steam Tank Obsidian has 40 Shield Points at the start of the fight, with 70,000 HP. While the Cannon has 4 SP and 24,000 HP, Smokestack has 5 SP and 22,000 SP, and the Glacis Plate has 6 Shields and 20,000 HP. Even though they have a relatively low amount of HP, they can still deal high damage.
Focus on taking out the smaller components, Cannon, Smokestack, and Glacis Plate, to first minimize damage. Once you have destroyed all three parts of the boss, you can set your focus on the Steam Tank Obsidian itself. At this point, the boss will be easier to defeat.
What you need to be careful about at this point, though, is that the Steam Tank Obsidian can also gradually heal and repair the components, bringing the fight back to stage one.
To prevent this from happening, you must go all out on this boss, targeting it with the heaviest attacks you have in your arsenal and also making sure you are targeting one or more of his weaknesses. If you manage to do so, this boss will be finished sooner than you would imagine.
Best party for Boss Fight
Since this boss is part of Partitio’s story, he will surely be one of the best characters in your party in this fight. Partitio’s ability is perfect for this fight – Hired Help, which offers 3x BP or 30k Leaves.
If you are considering Hikari, that would also be a good option, especially if he has the bow move or the multi-hit polearm. If not, you can bring along any other Hunter using Precise Shot and Draefendi’s Bow to target Steam Tank Obsidian’s Weaknesses.
In addition, you can also go with Apothecary because of their healing abilities and the skill to use Axes, one of the weaknesses you need to target.
Any Armsmaster that has the Sixfold Strike will be crucial here. This guy will be your main damage dealer, striking multiple enemies six times in a single turn.
