The hammer gives an extra 5% chance of saving a bar when Smithing an item with at least three bars, if wasteless smithing has been unlocked. Each activation consumes 3.57% charge, or 1.78% while in Prifddinas, so after it saves 28 or 56 bars, it reverts back to the crystal tool seed. The tool seed can be recharged by Ilfeen, Eluned, Islwyn or Rhodri Dail for a cost that starts at 7,500 coins but decreases by 1,500 every enchant, to a minimum of 1,500 coins.
Eluned refuses to enchant more than one at the first time saying that she needs "to know you better". After the second enchant more than one hammer can be enchanted at a time.
Enchantment
Cost for re-enchantment
First
7,500
Second
6,000
Third
4,500
Fourth
3,000
Fifth and thereafter
1,500
To turn the hammer back into a seed, players can speak to Ilfeen, Eluned or Rhodri Dail.