Dream Eater

Dream Eater is a Rune Weapon presumably created by Alistair and Sylvana Huntington together. It is a large scythe like arcane weapon of tremendous power in combat. It was originally wielded by Alistair against Sylvana and seemed to be a key weapon he used in her defeat and to curse her into her statue form of Ruby. It later became the primary weapon of Sylvana after she was freed from her cursed form and began her campaign to wipe out the Non-Blood Population. 
Song Killer seems to have originally belong to or was stolen by Alistair as its is seen being wielded by him in the final battle between him and Sylvana in the 1400s. It was what he used to deliver the final blow to curse her into her statue form of Ruby. However he at the same point was burdened with an identical curse due to a jinx Sylvana has placed on him earlier having foreseen his dissention turning him into the Sapphire Fox. Dream Eater's fate afterwards remains unclear but over 500 years later when Sylvana was freed from her cursed form she took up Dream Eater as her personal side arm. She used it to decimate a battalion of DSC and SPF agents and force many other sorcerers into submission having convinced them to follow her. 
She later used the weapon in the Battle of Fox Island to deal damage to the revived Sapphire Legion. However they were at least able to hold her off long enough to allow Alistair to regain his human form.