Spoiilers.
Without continuous updates to go eat or study or read or pray for the rest of the game.
This has been a serious issue for me. I tried doing the mission the correct way (getting poisoned, getting the key, getting the blood, running away, jailing the dude, etc) I tried doing all that, and then going back and getting kicked out of the order, I tried getting poisoned, then just killing the dude and grabbing the die, I tried killiing the dude and leaving the die, I tried killing somebody else…
Every time, ever after… I ended up getting constant monastery schedule notifications afterwards that drove me crazy.
Finally, last night, on my third playthrough of the game, I decided to try the roof method.
I never signed up for the monastery… never stole the scrip to get in, never talked to the monks… I climbed up the scaffolding, walked across and looked down into the courtyard where the monks were picking flowers… saw all four new monks in their white robes. Drew my sword… hopped down on the first roof, hopped down into the courtyard… checked each white robe until I found the right guy. Gutted him with my sword… ran into the pantry and got the key to the monastery, opened a door, whistled for my horse, and rode away from the guards.
Found the guys in the swamp… killed them, and then talked to the innkeeper and found out about the bandit camp and reported back in at Rattay.
Mission accomplished, and no more constant annoying updates about going to eat or pray.
On various playthroughs I spent around 5 hours on this mission trying to do it in various ways…
The only way that didn’t “break” the rest of my game was to skip it.