Senna vs Twitch

Attack the souls held by the Mist whenever you can: each soul freed with Absolution (passive) increases your AD, attack range and crit chance.

Fire Piercing Darkness (Q) through an ally or an enemy to hit both: the beam heals your allies, and damages and slows enemies in the line.

Cast Last Embrace (W) on a target that's already slowed or immobilized: after a short delay, they and nearby enemies are rooted.

Cast Curse of the Black Mist (E) to engage or escape with your team: allies who enter it are camouflaged, then fast and unselectable.

Cast Dawning Shadow (R) to save an ally across the map: the beam has unlimited range and shields allies.

Get out of the Venom Cask (W) cloud fast: it slows you and adds a Deadly Venom stack every second, which powers up his Contaminate (E).

Ward your brushes and place a Control Ward on his paths: it reveals camouflaged enemies, and Ambush (Q) lets him reach you unseen.

As soon as he comes out of the Ambush (Q) camouflage, focus him with your allies: he's fragile and has no dash to escape.

During Spray and Pray (R), get out of his extended range until the effect ends: his bolts pierce every enemy, so hiding behind an ally won't protect you.