How to Mod

What a riven is for

A riven is a weapon-specific mod with random stats scaled by that weapon's disposition. High disposition means bigger numbers. Low disposition means the same roll types hit smaller ceilings. The riven still spends a full mod slot, so it has to beat a normal mod that would live there.

• Disposition is per weapon (and known for most of them). Check it before you commit Endo, Kuva, or platinum.
• Rolls can include two or three positives, optional negatives, and different polarities. More positives usually means each line is weaker than a clean two-stat roll.
• Negatives are not always bad. A harmless negative can leave more budget on the stats you want.

When it earns the slot

Treat a riven like any other mod: one job in the grid. It should cover a gap or beat the next-best option in that slot, not exist because it looks shiny.

• Do: crit chance + crit damage on a crit stick, multishot + damage on a gun that needs both, or a faction line when you farm one enemy type.
• Don't: keep a riven that only repeats a pool you already filled (another flat +damage when Serration / Galvanized / primed already covers it) unless the numbers clearly win.
• Compare against Primed, Galvanized, and dual-stat mods. If the riven loses that fight, sell, trade, or reroll. Do not force it.

Rolling without going broke

• Grade the roll against disposition ranges before you decide it is "god tier" or trash. FrameHub's Riven Grader does that against scaled pools.
• Reroll cost climbs. Set a stop rule (budget, or "good enough for this weapon") before you start burning Kuva.
• Unlock and rank the riven so you see real drain and real stats. An unranked preview can lie about whether it fits the capacity plan.