Belongs to the Runebound Series.
Card expansion for Runebound, 2nd Ed. From FFG's website:
In the fight for glory and power, only one type of magic is more powerful than the legendary Runestones, and that is ritual magic. This expansion introduces a powerful new type of Item, rituals, which require you to roll and expend certain terrain symbols before they can be used. The trade-off: they are far more powerful and versatile than other Items of the same cost.