BOSS HELP
Sister of Mercy: boss guide
The Sister of Mercy encounter has an earlier stealth section and a later boss fight. This guide helps you identify which one you are in.
Stealth encounter or boss fight?
During “Get the Genesis Configuration Back,” distract her with bottles and reach the opening upstairs. The later “Claim the Sister of Mercy’s Heart” objective is the boss fight. Place the Gagged Skull in the door beside the shop to continue toward it.
Prepare at the nearby shop
- Save, replenish ammunition and carry healing items.
- Bring the shotgun with Dragon Breath Rounds if available, plus an SMG or assault rifle.
- Keep a ranged weapon ready: she flies around the dance floor, making melee a poor fit.
Fire, ranged damage and knife attacks
TheGameSlayer recommends igniting her with the shotgun, then using automatic fire during the opening. Keep moving to collect arena ammunition. When she throws blades, prioritize dodging or cover; later volleys are more dangerous.
When the arena turns red
Hint The red haze marks a change in the fight. Watch for her approach instead of firing blindly.
Reveal solution
Before leaving the dance floor
Collect the heart and her Whip, which can be sold to Zora. The route onward opens behind the DJ booth. Defeating her awards the “No Mercy” story trophy.
SOURCES & COVERAGE
Compiled from the sources below; last reviewed October 12, 2026. We have not independently playtested these entries.
PowerPyx · Gage’s full walkthroughTheGameSlayer · Callum Marshall’s Sister of Mercy guidePowerPyx · Trophy roadmapRead our editorial policy
