Overview
There Can Be Only One is a Blood and Wine secondary quest that leads to Aerondight, one of the finest silver swords in the game. It can be picked up from the notice board on the Gran’place or by overhearing two knights, Bors and Percival, at the Tourney Grounds, though Geralt can also simply go straight to the lake. Virtues proven before the quest starts still count.
At Lac Célavy
On an island in Lac Célavy, northwest of Beauclair, a small inner lake hides a bearded hermit, and Geralt finds he can walk on its water. Stones by the shore describe the five virtues of Toussaint’s knights: valor, honor, compassion, generosity and wisdom. Once Geralt has proven all five, the hermit agrees to fight him for the sword beneath the surface. After his defeat, the hermit sinks into the water, the Lady of the Lake appears, and Geralt receives Aerondight, a relic silver sword that grows stronger with every blow it lands in a fight.
Proving the virtues
Each virtue needs only one proof. Some choices exclude each other, so there are several routes.
Valor
- The Night of Long Fangs: kill the katakan attacking Delwyn of Creigiau on the stairs from the palace to the Hauteville bridge.
- Tesham Mutna: kill Dettlaff.
- The Warble of a Smitten Knight: stay in the tournament and win it.
- Feet as Cold as Ice: help kill the grottore.
- Raging Wolf: defeat the Maestro.
- Contract: Bovine Blues: slay the slyzards.
- Equine Phantoms: do not forgive the spirit.
- Mutual of Beauclair’s Wild Kingdom: kill the basilisk.
- Contract: The Tufo Monster: kill the monster.
- A Knight’s Tales: make Lynx Crag lift the curse.
Honor
- The Warble of a Smitten Knight: enter as Geralt of Rivia and win the mounted duel against Prince Anséis, or keep Vivienne’s secret from Guillaume.
- Till Death Do You Part: tell Charles Lanzano there were no beasts in the cemetery.
- Goodness, Gracious, Great Balls of Granite!: return the stones to the curator.
- Father Knows Worst: agree to find the condenser for Hugo before picking it up.
Compassion
- The Beast of Toussaint: spare the shaelmaar.
- The Hunger Game: let Marlene stay at Corvo Bianco.
- Capture the Castle: help Roderick with his wound.
- Goodness, Gracious, Great Balls of Granite!: let the old man keep the stones.
- Big Game Hunter: free the panther, join Beledal at the feast and ask about his daughter.
- Mutual of Beauclair’s Wild Kingdom: let the basilisk live.
- Equine Phantoms: have Roach forgive the spirit.
- Contract: The Tufo Monster: give the pendant to Madame de Bourbeau.
Generosity
- Turn and Face the Strange: pay the delivery boy 5 crowns for the letter.
- Where Children Toil, Toys Waste Away: pay the bootblack 500 crowns without haggling or using Axii.
- Beyond Hill and Dale…: buy Syanna’s ribbon from the little flint girl for 500 crowns, or win it at gwent.
- Mutual of Beauclair’s Wild Kingdom: after sparing the basilisk, refuse the extra coin.
- A Portrait of the Witcher as an Old Man: buy the painting for 1,000 crowns.
- Equine Phantoms: haggle over the reward, then turn down the potatoes.
Wisdom
- The Beast of Toussaint: guess Milton’s hideout correctly.
- La Cage au Fou: lift the spotted wight’s curse instead of killing it.
- A Knight’s Tales: lift the curse using Gareth’s bones.
- Father Knows Worst: urge Hugo to talk to his brothers rather than attack them.
- Gwent: To Everything – Turn, Turn, Tournament!: win the tournament.
- But Other Than That, How Did You Enjoy the Play?: light the candles in the right order on the first try.