Gjallarhorn, Horn of Heimdall

"I do not want this war. We have suffered enough. Prophecy did not lead us here, nor will it win this battle. Wars are won by those who are willing to sacrifice everything. If that is the cost of vengeance… so be it" - Unknown  

Polymorphic Weapon

Deals 3d6(3d8)+3 magical piercing/slashing/bludgeoning/force damage. This item grants the wielder proficiency with it when it is equipped. Depending on the weapon variant the user chooses, this weapon may have the Ranged (30ft/60ft), Reach (10ft), Returning, Thrown, and Versatile properties.

Swiss Army Knife

You may transform this item into nearly any single item you can imagine by willing it. You cannot make an object that is too complex, such as an engine or clockwork, or something that requires magic to function, such as an arcane battery. Some examples of items you could create: sailboat, chariot, paraglider, skateboard, lockpick, walking stick, cup, musical instrument, ring, etc.

Aether Resistant

While this weapon is equipped, you gain advantage on saving throws against all spells or magical effects.  

"Trust me Mother, when the time is right, he will know what to do. He will save everyone. I don't need to believe, I know."

— Karnatis Seradz, The Peerless Oracle and God of Time on the final wielder of Gjallarhorn

Herald of Ragnarok

By reverting this item to its default horn form, you gain the ability to blow through it, sounding a magical tone throughout the entirety of Valakadyn. As the cry sounds, all creatures who can hear it, except those you exclude, gain the effect of a Long Rest, as well as 100 temporary hit points, advantage on Constitution Saving Throws, and an additional +5 to all attack and damage rolls for one minute. Using this ability creates a Wild Magic Event centered on the caster, which has disastrous consequences. When you use this ability, the item disintegrates, and your form is overloaded with Aether, destroying your body down to an atomic level. Choose your moment wisely.