Prerequisite: 11th-level ArtificerItem: diamond worth at least 50 gold and an arcane focus
This magical diamond is bonded to an arcane focus. When
the wielder of this focus casts a spell that deals damage, it
can change the spell’s damage to acid, cold, fire, lightning,
poison, or thunder damage.
At 17th level, this magic arcane focus grants its wielder
a +1 bonus to its spell attack rolls and its Spell save DC.