Call of Sul'thraze

Call of Sul'thraze is a one-time action that combines the rare one-hand swords and  into the epic two-hand sword.

Warnings
This process consumes both the original swords and is not reversible, and it is possible to create a sword you cannot use.

If you are a Rogue and can use both one-hand swords but not the two-hand sword, combining the two one-hand swords may be undesirable. Also, and  can be used and combined at level 45, but  requires level 50 to be equipped.

Any enchantments on the original swords will be lost.

Casting
In order to cast Call of Sul'thraze, equip and right-click on it. It is not necessary to equip both swords; only needs to be in your inventory.