Nocturne

Just ban that thing

Rammus

Your W knockup counters his Q Silvermere can be a nice item here, since his E is so annoying. Buy Black cleaver right after your mythic if no one goes for it.

Kindred

Shouldn't be a huge problem if you can get close to her. (Stridebreaker hello), W knockup her right before the end of his ult so she won't dash out and you'll kill her BUT, her ult counters yours

Naafiri

What a cute doggy Your Q counters her wolves + once you get death dance, you'll destroy her

Nunu & Willump

if he ults, 2 options : Use your knockup or use your E to escape. If you can't escape or stop his ult, good luck.

Viego

Briar

Shouldn't be a problem but ask your team for some antiheal just in case.

Fiddlesticks

His ult is the most annoying thing here. Keep your burrowed E to escape it.

Warwick

At a certain HP cap, he'll get a massive regen boost with auto attacks + his ult, you might want to keep your ult for this beast. Ask your team for some antiheal

Elise

She counters your ult and your mobility, very annoying matchup. Might want to ban her

Ekko

Skill matchup, don't ult him before he uses his.

Jarvan IV

Not a huge problem and skill matchup. He's like rek sai except his ult can block someone in an area. Keep your ult for a carry, is J4 ults you, use your E to go to someone else. Ask supp or toplane to engage

Kha'Zix

He's just a little bug. Be carefull early, you win in late. go Death's Dance and he's useless against you

Talon

Same as Kha Zix, keep your ult is he tries to escape over walls.

Kayn

He counters your ult. both forms are annoying but the red one is the hardest one to play against as rek sai. Huge mobility champ, you might want to build stridebreaker

Evelynn

Skill matchup, buy pinks

Rek'Sai

Better rek sai wins

Skarner

He's a bigger threat than you in teamfight. Ask your frontliner to stop him from coming to the backline. If he doesn't ult you, their backline is free.

Jax

He gets trinity and you lose hard. Just don't try to 1v1 him, gank lanes and get bigger

Master Yi

His Q counters both your ult and your E escape, he's prety weak early, he shouldn't be a huge problem if not fed