This guide will go over what Riven Mods are, how they work, how to reroll them, and covers a few basic strategies for obtaining Kuva-the currency needed to reroll these strange Mods. If you love a weapon that can't quite hang in level 100+ content, a good Riven Mod can fix most of your damage-scaling issues. While tied to layers of RNG, these Mods can provide an immense damage increase to your favorite weapons. Related: Warframe: All Damage Types Explained Players receive one after completing the War Within quest with no context of what they are, how they work, or why you'd ever want to use them. Riven Mods are one of the most confusing systems in Warframe.