Deep wounds and assassin cost

Championcritic

Can anyone verify that it still costs 1 carbonadium and 2 stony cores to go up one level for deep wounds/assassin? I have an alliance member that claims it cost him 1 carbonadium and 3 stony cores.

winterthur

1 carb and 2 stony. Will try to get image.

Championcritic

My alliance mate admits his mistake, thanks anyway guys