Climb Prison Tower
Return with Arcane Whip, follow the exterior wall and elevator to Upper Tower, then cross the blade and spike hazards to Roof of the Tower.
Fight the first encounter
Stay at medium range to read Joan’s sword attacks. After a combo ends, land one or two hits and reset your position. Some high horizontal slashes can be ducked under; this does not apply to every sword attack.
As the fight progresses, her combos become faster and recovery windows shorter. Favor a safe hit after a heavier attack rather than extending a risky combo.
Take the key and Holy Light
Absorb The Warrior for Infernal Pyre and the Warrior key. The following Holy Light unlock is a separate special action: it clears Chaos Shards and enables parrying across weapon types.
With Fallen, Prophetess and Warrior keys, return to Catacombs Gate.
Courage is a separate rematch
The Courage trial includes another Joan fight with added fire-pillar and landing attacks. Do not assume every rematch attack belongs to the Prison Tower encounter.