Kor Kadrel / Star Forger

Kor Kadrel or Star Forger in common

legendary (requires attunement by a  dwarf. if this hammer is attuned to a dwarf, he gains a resistance to fire damage and gains proficiency when used to smith.)

Said to be created Moradin himself for the first of his saints, this hammer is the hammer of creation. Each swing with this hammer brings with it 3000 degrees(F). Used by Saint Dornn, the ancient blacksmith, said to have forged the first stars; he did not require a forge; for the hammer was his forge. Heating and shaping weapons and armour with each swing

When using this hammer to create a weapon, armor, tool, or anything else with metalwork, a forge is not required.

Proficiency with a warhammer allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Dormant  One with the forge: Gain Fire resistance Heat of creation: 2d10 fire damage

Awakened Hey you over there! :

The weapon gains the thrown property with a normal range of 20 feet and a long range of 60 feet. the weapon flies back to your hand after attack.

Hammer down:

Once per day, you can to smash this hammer into the ground as an action to cast Earth Tremor at second level. The point of impact on the ground is the center of the spell's affected area, regardless of if you throw or hold onto the hammer when casting the spell.

The DC for this spell is equal to 8 + your proficiency bonus + your Strength modifier.

Master of fire and forge: Cast cast the mending cantrip Can cast heat metal at 9th level once per day. Can cast fabricate and creation as  6th level spells once a day