How does "winter spirit" node affect doomfletch?

there is a node "winter spirit" which converts 20% phys dmg to cold, one node before does the same, total 40% convertion.

how does it relate to doomfletch core mechanics based on phys dmg?
question is: does the convertion delete 40% of phys and makes it cold dmg, or all phys dmg stays on place and we gain additional cold dmg?

on path of building it definitely adds dmg, but im not sure how it works in reality?

"

zoomski wrote:

how does it relate to doomfletch core mechanics based on phys dmg?
question is: does the convertion delete 40% of phys and makes it cold dmg, or all phys dmg stays on place and we gain additional cold dmg?

Doomfletch adds damage based on phys before the conversion, and 40% of the phys damage it would normally do becomes cold damage.