TL;DR
- Thiollier’s quest requires defeating three main bosses before advancing to Shadow Keep
- Locate Thiollier near Castle Front Site of Grace and Moore at Main Gate Cross
- Explore Cerulean Coast and descend Stone Coffin Fissure to find St. Trina
- Make crucial decisions about imbibing St. Trina’s gift that affect outcomes
- Complete all steps before Belurat Tower of Shadow to avoid point of no return
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Throughout your journey in Elden Ring: Shadow of the Erdtree, you’ll encounter numerous supporting characters with diverse motivations for following Miquella’s path. However, one character stands apart with complete devotion to a different entity. This comprehensive guide details the complete Thiollier and St. Trina questline, providing essential navigation through this complex narrative arc. Please be advised that this content contains significant spoilers that reveal major plot developments.
The intricate quest chain for Thiollier and St. Trina encompasses multiple stages that span several regions within the DLC expansion. Success requires thorough familiarity with the world map layout and strategic progression planning to avoid missing critical interactions.
Critical Warning: Ensure you complete every quest objective before undertaking the pivotal action connected to Belurat Tower of Shadow (major spoilers). This campaign segment functions as an irreversible progression point where incomplete quests become unavailable.
The visual guide above illustrates the preliminary objectives for initiating Thiollier’s personal quest in Elden Ring: Shadow of the Erdtree. You’ll need to engage in dialogue with both Thiollier and the merchant Moore to establish the foundation for this narrative thread.
To locate Thiollier, begin at the Castle Front Site of Grace and proceed south-southeast along the roadway. You’ll eventually spot a distinctive Miquella Cross marking his position. Conversing with Thiollier reveals his fervent dedication to St. Trina as his primary devotion. He additionally offers various poison-related items for purchase if your build incorporates such tactics.
Moore occupies a position adjacent to the Main Gate Cross, situated directly before Belurat Tower Settlement. He maintains a modest inventory of merchant goods. Our successful progression required completing these prerequisite encounters:



Following your initial interactions, the quest advances to more treacherous territories requiring careful exploration and combat readiness. The Cerulean Coast presents substantial environmental challenges with hidden pathways and aggressive inhabitants. Successfully navigating this coastal region leads to the Stone Coffin Fissure, a geological formation concealing profound narrative developments.
The descent through Stone Coffin Fissure demands precise platforming skills and awareness of environmental hazards. The seemingly endless drop culminates in a confrontation with the Putrescent Knight, a formidable opponent guarding access to deeper mysteries. This boss encounter tests both mechanical skill and strategic adaptation to unique attack patterns.



Pro Tip: The Putrescent Knight employs area-of-effect decay attacks that can quickly overwhelm unprepared players. Maintaining distance during certain animations and exploiting elemental weaknesses significantly improves success rates. Many players require 3-5 attempts to master this encounter’s timing and positioning requirements.
The culmination of your journey brings you face-to-face with St. Trina herself, presenting narrative choices with lasting consequences. The decision to imbibe St. Trina’s gift carries significant implications for both immediate outcomes and broader character development arcs.
Thiollier’s reactions to your choices reveal deeper layers of his character motivations and personal conflicts. His jealousy and devotion create complex interpersonal dynamics that unfold based on your actions throughout the questline.



Critical Decision Analysis: Accepting St. Trina’s gift unlocks unique narrative paths but may close alternative opportunities. Declining preserves different story branches but risks missing exclusive content. There’s no universally “correct” choice—your decision should align with your character’s roleplaying preferences and desired outcomes.
The quest’s conclusion provides resolution to Thiollier’s personal journey while offering valuable rewards that enhance your gameplay experience. The complete narrative arc typically requires 2-3 hours to finish, depending on exploration thoroughness and combat proficiency.
Action Checklist
- Locate Thiollier south-southeast of Castle Front Site of Grace near Miquella Cross
- Find Moore at Main Gate Cross before Belurat Tower Settlement
- Defeat Divine Beast Dancing Lion, Rellana, and reach Shadow Keep’s gate
- Navigate Cerulean Coast and descend Stone Coffin Fissure
- Confront and defeat the Putrescent Knight boss
- Make critical decision about St. Trina’s gift
No reproduction without permission:SeeYouSoon Game Club » Thiollier And St Trina Guide – Elden Ring: Shadow Of The Erdtree Complete guide to Thiollier's devotion questline with St. Trina in Elden Ring's Shadow of the Erdtree DLC
