A gwyhyr is a splendid gnomish sword, regarded as the best in the world. The gnomes had ceased production of these weapons more than two hundred years before the events of the saga. Gwyhyrs were forged with "dark iron" which made the blades light and sharp as a razor. They were also characterized by their undulating edge and hide covered hilts.
Leo Bonhart wanted a sword for Ciri, and he had chosen a gwyhyr from the collection of a particularly dedicated swordsmith, Esterhazy. She named it "Jaskółka" (English: Swallow; Old Tongue: Zirael).
In The Witcher 3: Wild Hunt
| Gwyhyr | |
|---|---|
 Steel sword. Used when fighting humans. | |
| Description | |
Inventory/slot |
Equipment / Steel weapon |
Category |
Relic |
Type |
Steel sword |
Required level |
19 / 20 |
Runes |
3 upgrade slots |
Source |
Loot |
Base price |
402 
|
Price to buy |
556 / 660
|
Price to sell |
109 – 335
|
Weight |
2.34 
|
Durability |
100 |
| Effects | |
 165 – 201 / 228 – 278+2 – 100 Armor piercing +1 – 10% Yrden Sign intensity +1 – 10% Critical hit damage bonus +6% Chance to cause bleeding | |
| Dismantling | |
Components |
1× Leather scraps 2× Dark steel ingot 2× Ruby dust 1× Amethyst dust |
Console ID |
Gwyhyr
|
One such sword can be found inside the cave where Harrisi has her nest.
See also
In The Witcher 2: Assassins of Kings
| Gwyhyr | |
|---|---|
 Steel sword | |
| Description | |
Category |
Rare |
Type |
Steel sword |
Effects |
 30 – 40 +20 reduction on block +30 +15 – 20%Stun + 5 – 10% |
Rune slot(s) |
3 |
Source |
Cecil Burdon |
Price to buy |
1776 – ? 
|
Price to sell |
90
|
Weight |
 8
|
Gwyhyr appears in The Witcher 2 as a rare steel sword. It is the best steel sword available in Act 2. Geralt obtains the sword by completing the Baltimore's Nightmare quest in Chapter 2 if he sides with Iorveth. To obtain it, he must keep Master Baltimore's notes from Thorak (i.e. he cannot show him the notes!). this ultimately leads to the witcher being forced to kill Thorak after which he returns to Alderman Cecil and is rewarded with the sword.
Alternatively, showing Thorak the notes but rejecting his offer to let him search the workshop first will turn Thorak and his team hostile. This has the same result as not showing Baltimore's notes to him in the first place.