Remember those weird alien / mushroom looking dudes you found in the Bloodborne forest? There were the ones that looked like sea anemone that shot lasers at you? Well, now one of them is a boss. Take a bunch of those little dudes, add neat looking flowers, and have one of the blobby cowards grow to tremendous proportions and you got this fight. As long as you’re patient and choose the right times to go in – you should be fine. You’ll see me switch to the whip for the AoE damage. I’d recommend taking something similar to this fight.
Bloodborne: Celestial Emissary Boss Fight
So this is a thing you can find and fight