Riven

• Build full crit with Voltaic Cyclosword instead of a fighter build.²
• A tank build with cooldown reduction, Escapade, and Phenomenal Evil can stack free attack damage over time.³
• With Reverberation, Ethereal Weapon, Mystic Punch, and Darksteel Talons, repeatedly casting Q and W can kill enemies.⁴
• Shojin is very strong on Riven.⁵

• Fan the Hammer and Dual Wield: Passive does not interact.⁶

• Reverberation does not work with Moonflair on Riven's W because the stun occurs at the start of the cast time, before the ability goes on cooldown.⁷
• Firebrand can fail to apply stacks to Riven after at least 10 seconds of attacking with 5 attack speed and Dual Wield.⁸
• Knock Up with Force of Entropy can fail to trigger when Riven is knocked up by Blitz.⁹

• Riven could reliably deal with Blitz by killing him before he could react when she had a high roll.¹⁰

Earlier formats

• Since patch 25.22, Riven's third Q knockup no longer gets cut short when an enemy target hugs a wall.¹¹ 8x2 duos
• Atma's Reckoning's passive still works when it is not supposed to, allowing Riven to reach 80% critical strike chance by stacking health.¹² 8x2 duos
• Riven is a good pick for crit builds with Atma's Reckoning, which guarantees three critical strikes during an ultimate.¹³ 8x2 duos

Riven's main strengths were low cooldowns and high mobility; Arena's available cooldown reduction, mobility, and tank stats could counter her.¹⁴ 8x2 duos

• Lethality and penetration worked well with Riven because she has many dashes.¹⁵ 8x2 duos

Riven's Q moved toward the direction her champion faced: clicking an enemy champion first could prevent her from moving forward, while clicking the ground could let her move past a nearby enemy.¹⁶ 8x2 duos

• Outlaw's Grit was very good on Riven; the build mentioned Guardian's Horn, Executioner, and Shadow Runner.¹⁷ 8x2 duos
• Trailblazer worked well on Riven with burn augments.¹⁸ 8x2 duos
• Riven could appear in either Guest of Honor voting phase, with no change to the rules.¹⁹ 8x2 duos