Shaco in every game

Shaco is assassin. In assassin's fights player who attacks first will win. Shaco is invisible so he's always attacks first.

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its easy.

Grab any assassin or bursty melee. or darius. And nuke him when he ganks.

I don't understand how shaco players survive with all the Khazix, rengar, fizz, leblanc, ahri, zed and ekko mains out there.

I highly recommend Riven for all your Shaco problems. "The time for talk is over."

Until he uses his ult to dodge all your burst, then kills you for your audacity. Or just uses his clone+E to kite you into boxes and walks away laughing. Every single one of the champions you mentioned can have a large portion of their burst negated by Shaco's ult. But, as was previously mentioned, 99% of players can't use Shaco properly.

As for the "just buy pinks" argument, yes pink wards will counter Shaco hard...........in teamfights, and that's assuming you know he's coming for you. At any other time, Shaco doesn't really care about pink wards because out of all junglers in the game (with the possible exception of Nocturne) Shaco has the easiest time finding ways to get into your lane. You act as though there's only 1 gank path for every lane, which is just not true at all. A pink ward will cover one path, but a good Shaco player will simply find another way, either with a lane gank, Qing over the wall at raptors into mid, Qing over the wall between bot lane's turret and red side's jungle, Qing from behind top's turret into the unwarded top lane bushes, etc. One pink ward won't cover all entrances.

Also, while Riven is a pain in the ass to gank, a smart top laner will bait her into wasting all her movement abilities to engage on them, after which Shaco will pop in and clean up. As long as Shaco avoids the knockup/stun with smart positioning or use of his ult, outplaying her is possible with good teamwork.

Pliiis, I've seen Shaco in chinese pro-matches. Google InSek games.

Btw xPeke was also famous with his Shaco plays in times when pinks weren't limited.