Mel uses Rebuttal (W) to reflect and block Lux's Light Binding (Q) and Lucent Singularity (E), and with the longer range of Radiant Volley (Q) she wins the poke war.

Veigar has no dash, so he is fully exposed to Mel's constant poke, and Mel reflects Baleful Strike (Q) with Rebuttal (W) to shut down both his stacking and his trades.

Mel sends Vel'Koz's main Plasma Fission (Q) back with Rebuttal (W), and in a poke fight where neither has mobility she leverages that reflect advantage to pressure him.

Mel reflects Brand's Sear (Q) and Pillar of Flame (W) skillshots with Rebuttal (W) to turn his burst back on him, dominating a ranged poke fight with no melee threat.

Mel neutralizes Zyra's Grasping Roots (E) snare and plant skillshots with Rebuttal (W), and the immobile Zyra keeps losing ground to Mel's sustained poke.

Leona's Zenith Blade (E) dash engage is not a projectile, so it cannot be reflected by Rebuttal (W), and once caught the squishy Mel is instantly killed in the CC chain.

Rakan's Grand Entrance (W) dash engage cannot be reflected by Rebuttal (W), and after the knockup he closes instantly to catch the immobile Mel.

Alistar's Headbutt (W)-Pulverize (Q) instant engage has no projectile, so Rebuttal (W) is useless, and the knockback and stun force a lock onto the squishy Mel.

Pyke nullifies Mel's Rebuttal (W) timing with roams and stealth approaches, and secures the low-health Mel with Death From Below (R).

Even if Nautilus's Dredge Line (Q) is dodged, he locks Mel down with melee engage and the chain CC of Staggering Blow (P) and Depth Charge (R), and the immobile Mel cannot escape.