Board Thread:Questions and Answers/@comment-173.60.41.175-20151027030627/@comment-25669516-20170704085735

If you re-enchant with Mythical Recipe you will get Tempest Rage again since it is the only one available.

If you enchant an equipment which had only small or medium recipe with Mythical Recipe, then you will get Tempest Rage + whatever small/medium enchantment you initially had.