Out of the Abyss: A Trio of Magic Weapons for D&D 5th Edition

In the Rage of Demons DnD game I'm running, the characters recently got a small cache of weapons that had been forged by a small clan of Salamanders.  

CORONA

Magic weapon (greatsword), very rare (requires attunement)

You gain a +2 bonus to attack rolls and damage rolls with this magic weapon

In addition, a creature that touches you or hits you with a melee attack while within 5 feet of you takes 2 fire damage.

SHIMMER
Magic weapon (dagger), very rare (requires attunement)

You gain a +2 bonus to attack and damage rolls with this magic weapon.  

In addition, you may cast the misty step spell twice per day.

HEATDEATH

Magic weapon (long bow), very rare (requires attunement)

You gain a +2 bonus to attack rolls and damage rolls with this magic weapon.  

In addition, you deal fire damage with this bow.

Finally, if you score a critical hit with this magic weapon the target suffers one level of exhaustion.