###Prerequisites
Climb or fly
###Starting the quest
Head N of Casablanca entrance until you find a confused monk
ASK MONK HELP
ASK MONK YES
This will unlock the cable car and start the quest
###Meet the head chaplain of Montserrat
Follow the path until you have to climb
Climb or fly u
Jump car
Get xp
You can mostly walk around here safely as the SS Officers are not agg
However, any mob named SS-(something) will be agg
just don't go into the room north of the Chaplain (yet)
or n of In Front of Santa Maria Basilica
(unless you have a team. the SS-reichsfuhrer heals every round if your group is too small)
Go u2nw to see the Chaplain
ASK CHAPLAIN HELP
###Identify a safe opportunity
Go wu from the chaplain
Wait here (and/or possibly look view) until you identify patrol patterns
Go back to Chaplain
ASK CHAPLAIN PATROLS
He will give you a key
W of the upstairs view is a hidden room that will give you xp on first visit
Bow to the statue there to get a repeatable str buff
###Find the secret of the Black Madonna
e2ne of the Chaplain is a locked door
now, theoretically you wait out the patrols before unlocking the door
I could never find a time when they were away from the door, so I just picked them off one by one (you can shoot/throw them into individual fights)
(don't unlock it in front of any Nazis unless you want to fight a bunch of Nazis at once)
Once you're in, head u
You'll find the Statue of the Madonna
If you bow to it as the description suggests you can get a scroll that will let you complete the Spirit Stat quest (just give the scroll to the Chaplain)
TAKE STATUE
You will get a plain wooden cup instead
Go back to the Chaplain
GIVE CUP CHAPLAIN
###Find the grand secret of the Benedicti
You will have to get the Secrets of the Benedicti book from n of the Chaplain.
You will likely have to fight the SS-oberfuhrer and loot his body, but it may be possible to sneak in and GET SECRETS SHELF without fighting him.
Either way, go back and GIVE SECRETS CHAPLAIN
###Save what is most precious
The Chaplain will open a portal to Camelot
USE PORTAL
Head w
GIVE CUP BLAISE
You'll get an announcement on info, a blessed earring, and the whois.
Would it be possible to turn the Grail in to someone else for the Grail quest? Probably not, but I didn't try...