Silver Eagle Weapons

Weapon (greataxe, greatsword, lance, or maul), uncommon

You gain a +1 bonus to attack and damage rolls made with these silvered, magic weapons of elven make. These weapons deal 2d6 damage instead of their normal damage dice, and landing a critical hit with the weapon doesn’t double the weapon’s damage dice. Whenever you land an attack with the weapon and roll the same number on both of the weapon’s damage dice, you can immediately roll another d6 and add it to the weapon’s damage dice. You can continue rolling extra damage dice until you roll a number that does not match the previous rolls. 

The elves and humans formed a unique alliance, recognizing the beauty of each other's unique talents and limitations. The humans recognized the elves' talent of forging beautiful, magical armaments, while the elves worked with humanity's limitation of being ordinary far more often than extraordinary. Needless to say, the humans tolerated the elven tendency to be rude, in kind.