Lets assume that the ice anvil is as resistant to physical blows much like a normal anvil and its never melting(will not explode as well). It will always maintain its negative temperature enough to turn human hands into ice with continuous use.
How would an Ice anvil(That never melts or break or explode when exposed to super high temperatures) change forging process as is?
How would it affect the metalworking?
How would it affect forging process?
Is there even a benefit using an ice anvil?
Materially speaking how would anything forged using an ice anvil compare to the normally forged ones?