The faction you belong to will dictate which quest you do to obtain a Red Rune Silveran item. These items are once per character and you must be 140+ to obtain or use this item (the items are freely passable amongst characters and can be used by anyone over 140, there is no skill requirement). If you are a member of the Whispering Blade, complete the Tracking Grael quest. If you are a member of the Rossu Morta, complete the Grael's Summoning Chamber quest.