Whiteout Bitterfrost

Whiteout Bitterfrost stacks up to 3 times.
Each time Frostharden Iai is consumed through Basic Attack - Iai, gain 1 stack of Whiteout Bitterfrost.
When Whiteout Bitterfrost is full, Heavy Attack - Foreclaimed Self is replaced with Heavy Attack - Bitterfrost: Foreclaimed Self.
Casting Heavy Attack - Bitterfrost: Foreclaimed Self consumes 3 stacks of Whiteout Bitterfrost.