Ceaseless discharge is required to literally cease the discharge of lava that prevents you from heading deeper into the Demon Ruins. It is a fire-based boss that is confirmed to be the brother of the daughters of chaos. He is passive until provoked by attacking or looting the Gold-Hemmed Black Set.
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1 Homeward Bone
Ceaseless Discharge has an overhead attack where it slams one of its limbs into the ground. It can be easily dodged with a side roll. It will also sweep its limbs from side to side and knock you off the edge if you have little to no poise. Get close to it and roll.
It will begin spamming its limbs in the ground at random up to 10 times. Run behind cover immediately.
If you are too far from the boss it will slam a limb into the ground and stream fire at you.
There are a few different ways to beat this boss, and is not too difficult compared to other bosses you have to face.
The first method is to bait the boss back to the L-shaped hallway and down the stairs. When the boss starts its attack, run back up the stairs and wait for it to perform the attack. Once it starts run back down the stairs, wait for the smoke to clear, and attack. Rinse and repeat this method.
Another method is to head to the large rock where the armor set was located. Make a left and stop at the corner, waiting for Discharge to be around the stairs. As he spots you, let him attack and roll once. Then move into the first position and attack. Rinse and repeat this method. If he spews fire at you then you know you have the wrong position and need to experiment until it works.
You can also simply tank it and eat damage with the right build and miracles. You’ll be able to do this if you can survive the fire breath damage.
Archery is another method if you have few options. Equip gear that is strong in fire resistance and use the Flash Sweat Pyromancy. Run to the safe spot behind the giant boulder, run out and attack the tentacles with your bow and arrows, and run back behind to heal.
There is a cheese strategy for those who don’t want the challenge. Equip light armor, run in grab the gear, let him attack, and run back to the fog gate. Stop in the fog gate, let it jump over, and hang by one hand. A few attacks and it will plummet to its death.
*Note if you die en route that you will not be able to do this again*