Prolongation

Prolongation
Type	Runeword
Tier	Level 3
Effects	Each unblocked blow increases potion duration time by 0.5s.

Prolongation is a Runeword in Witcher 3: Wild Hunt. They were introduced with Hearts of Stone expansion and added unique effects for weapons. Runewords are only active on the weapon that is drawn out.

To add them you will need to find a Runewright at the far end of the map of Novigrad. Recommended level is 30+.

Have in mind that you will need to pay 30 000 Crowns in total to unlock all enhancements

Prolongation - Crafting requirements