Lane pressure with maximum Summoner Cooldown use.
Creative tools and rule bending
Swap Summoner Spells while out of combat. Swapping to unique Summoner Spells will increase the rate at which you can make future swaps.
Gain a free stopwatch. Stopwatch has a one time use Stasis active.
You can enter debt to buy items.
+5% Max CDR
+5% Summoner Spell CDR
+5% Item CDR
+27 Ability Power or +16 Attack Damage, Adaptive
Gain a burst of Lethality and Magic Penetration after using a dash, leap, blink, teleport, or on leaving stealth.
Takedowns on enemy wards cause friendly Zombie Wards to sprout from their corpses. In addition, damaging a champion after destroying a ward inflicts bonus magic damage.
Spellbook on Riven allows you to keep up heavy lane kill pressure at all times with super short Flash and Ignite cooldowns combined with Lucidity Boots and Cosmic Insight.
The stasis active allows you to make out-plays and suvive a close tower dive to snowball your lead. After using the Stopwatch, sell it for a bit of bonus Gold.
Future's market lets you hit you item power-spikes extra early. When combined with Lethality, your mid-game damage will be incredibly high.
Riven's mana-less kit means that CDR is one of her absolute most important stats. The extra bit of Summoner CDR also means more Flash and Ignite pressure.
Riven is one of the biggest abusers of Sudden Impact, with each use of [Q] and [E] refreshing the buff resulting in an almost permanent bonus Lethality buff.
Zombie Ward is a fantastic all-around rune choice thats to its reliability in being able to provide extremely extended amounts of lane safety.