Katarina + Lightning Strikes

R normally applies only 25/30/35% on-hit damage. With this, it becomes 50/60/70%.

Locks attack speed, but R attack speed scaling is unaffected.

R procs Vulnerability.

Katarina's R synergizes uniquely with Triggered Inferno's stacks — hitting multiple enemies with R instantly reaches S-rank for a double-spin AoE burst. Both R and Triggered Inferno get interrupted by CC, so pick your engage carefully.

Protein Shake plus Statikk Shiv gives huge attack speed; Slow and Steady converts it into AD. Katarina's ult attack-speed isn't affected, and she still benefits from the converted AD.

Tear the void.

Katarina's ult counts as a high-frequency channeled DPS ability and triggers on-hit. Pair with Kraken Slayer, Bloodthirster/Bork, and Jeweled Gauntlet + Vulnerable for the highest single-second DPS in the game. Every dagger thrown during her spin triggers a 7.17x damage multiplier.

Katarina's R procs on-hits, so Mystic Punch slashes her cooldowns mid-spin, enabling near-perpetual ult reaping.

Katarina's R throws many daggers across three enemies in a short window — every dagger procs Void Rift, and one ult can trigger 70+ Void Rifts. Insane. The ult also triggers Void Rift's 99% slow, locking enemies in for the full damage.

Protein Shake + Statikk Shiv + Slow and Steady = high-burst, tanky god. Pure luck — if you roll it, you win.

With Slow and Steady, build Manamune/Wit's End/Lethality/Heartsteel; with on-hit, build Kraken/Bork/Rapid Firecannon. Void Rift needs magic-pen boots, then Shadowflame/Stormsurge/Sorcerer's Shoes — late game go tank. Without on-hit, build Bork/Bork/Rapid Firecannon, then Death's Dance/Wit's End/Randuin's/Jak'sho.

Deft attack speed does affect R normally.

Every R tick stacks Master of Duality. If you go magic-to-physical conversion, it's godlike.