The entry gate should allow any ship that is battlecruiser sized or smaller.
"Previous explorers have commented that one of the gates requires a passkey. Alternatively, it can be bypassed by convincing the commander to unlock it. The overseer guards the Cathedral vigorously."
Room 1
On warp-in, there is a single spider drone. Killing it will spawn a wave of approximately 8 to 10 destroyers, and another spider drone. Killing the second spider drone will spawn a wave of 4 cruisers, and 4 destroyers... and another spider drone. Killing the spider drone will spawn 4 to 5 cruisers, 4 to 5 destroyers, and a Commander battlecruiser. Killing the commander unlocks the warp gate into the second room.
"The destruction of the Militant Commander has activated a mechanism inside the nearby acceleration gate. It now appears to be unlocked."
Room 2
"Cathedral Priest: The infidels are here! Defend the cathedral with your lives, brethren."
The second room contains a spider drone, 4 to 6 destroyers, and 5 to 7 cruisers. Killing the spider drone spawns another wave of 4 to 6 cruisers, 4 to 6 destroyers, and a spider drone. Killing that wave's spider drone spawns another 5 cruisers.
"Corpus Militant Overseer: You dare attack our place of reverence! You shall be punished for this blasphemous act, infidels!"
The Blood Cathedral in the middle of the area will spawn a Militant Commander (in a battlecruiser), 2 to 4 destroyers, and 4 cruisers.
Please note: Killing the commander might trigger an escalation.
Escalation - Medical Twilight
"The slaves you liberated from this Blood facility report that this was a holding place where slaves were gathered, before being sent off to a blood replenishing "medical" station. You have heard about those places; where the Blood members go to get their blood exchanged with the blood of a slave who has been put on a special "blood cleansing" diet for a period of time. Needless to say, this leaves the poor slave empty of the vital fluid in question. Understandably your newfound slaves are quite thrilled with these recent turn of events. None of them knows where this so called "medical" station is, but a couple can tell you that they were in another holding station like this one, before they came here and coincidentally it is not all that far away..."
This room contains 2 to 3 frigates, 4 destroyers, 4 cruisers, and 4 to 6 battle cruisers.
"The inhabitants of the Ritual Center have sent out distress signals, and more ships quickly arrive!"
Shooting the Blood Ritual Center will spawn another wave of 6 to 10 destroyers, and 6 to 10 cruisers. Additionally, once you shoot the Center more, another wave of ships will spawn, containing 6 to 10 frigates, and 6 to 8 cruisers.
Please note: There are several ships in the second wave which can Neut and scram. Make sure you have enough distance from the Ritual Center before spawning it.
Killing the Overseer can trigger a further escalation.
Escalation - Medical Twilight
"Another Blood hideout and more slaves. You find no clues as to where the medical facility is, but piecing together information from the slaves, you are pretty sure some part of this Blood operation is located here..."
You warp in into a group of 4 to 6 destroyers, 4 cruisers, and a faction frigate. Killing the frigate may trigger an escalation.
The second room of this site contains some rather destroyed scenery, and no spawns. Flying too close to the fragmented cathedral will trigger a smartbomb explosion.
"Someone has triggered a booby-trap set up near one of the cathedral fragments, causing a hidden smart-bomb to detonate. All ships inside the blast radius take damage."
Escalation - Medical Twilight
"This place seems to be deserted and recently so, as all systems are up and running. Your scanners can even pick up signals from small houshold appliances, indicating that somone should actually be home. When your instruments scan the outposts docking station, it turns up logs only few minutes old showing four ships departing at the same time, these logs are incomplete though, only listing departure time and destination. For some reason all the ships are headed for the same spot..."
You warp in into a group of 4 to 6 destroyers, 5 battle cruisers, and a faction destroyer. Killing the destroyer may trigger an escalation.
Escalation - Medical Twilight
"As you float among the debris of the pirate ships you notice several small canisters of ectoplasm, all marked with a place of origin, presumably the Blood's so called 'medical' facility. Whether it is carelessness, cockiness or plain old stupidity is hard to say, but these pirates didn't bother to hide where they came from. Then again, this might be another ambush..."
You warp into a large group of 10 to 12 destroyers, and 5-8 cruisers and battle cruisers. some of the destroyers have a chance to spawn waves of 3-5 destroyers and 2-4 cruisers. There are also Blood Phantoms in this pocket. Destroying those triggers new spawns.
Please note: Sometimes, you may get an escalation, even though the message does not show up. Check your journal to see if you received it.
Escalation - Medical Twilight
"Your ship's computer has picked up distress signals coming from the Blood Factory, which indicate them calling for backup. Be on the lookout for any additional incoming ships!"
You warp into a large group of 10 to 12 destroyers, and 5-8 cruisers and battle cruisers. some of the destroyers have a chance to spawn waves of 3-5 destroyers and 2-4 cruisers. Killing Blood Shades may trigger spawns of 5-10 elite frigates, and 3-5 cruisers and 4-8 battle cruisers. One of the waves will contain a Blood Factory Overseer battleship.
Please note: The Elder Corpum Priest NPCs do heavy neuting at a ranges as high as 35 km. It is recommended those are taken out as soon as possible, if you are using any capacitor-intensive modules
Once you kill the Blood Factory Overseer, the escalation finishes with the following message:
"You are pretty sure that at some time in history, there would have been places in the galaxy where destroying an evil thing like this would have prompted some noble and decent ruler to award you with a medal or even a prize."