What does Flik do ?

So ive been planning on making a Galakrond rouge and i see alot of pro decks that  have Flik Skyshiv (which i also have) and im just wondering what is the purpose of Flik Skyshiv in these decks?

Other than the fact that it's a buffed Assassinate paired with a 4/4 body for only one more mana?

Additionally to that, the fact that it hits all copies makes it a great board-clear against decks such as token druid that often have 5/6 treants on board.

It also instantly wins the game versus holy-wrath paladin, but that deck is basically extinct.

The card's just really good. Similar to Vilespine Slayer previous rotation.

I don't understand why you don't understand why this card is good.

It is a 6 mana 4/4 that destroys whatever you want.

It is a removal card. It's role in the deck is the same as the role of any other kill card in any other deck.

And in the rare event you go against an Albatros deck you can knife the birds!

Trump summarised it well when he made a singleton rogue near the start of the expansion. I don't remember exactly how he phrased it but he essentially considered Flik to be an unfair card more or less on par with Zephrys and Alexstrasza.

Viewing it another way, rogue has been built to have the best single target removal of all the classes, and Flik is arguably the best of those. (I personally think she's a fair bit better than Vilespine Slayer was. That's subjective but says a lot!) Given you choose a class based on what it is good at, it becomes quite obvious that Flik ends up in pretty much every rogue deck regardless of what the archetype is: she's one of the reasons to play rogue in the first place.

Flik is awesome, for all the reasons named above. Worst case it is Assassinate on a 4/4 stick, but with Shadowstep it becomes a real annoyance.  It can target "Can't be targeted" minions, which is great against Embiggen Druids or Scion of Ruin. 

I play it in my (mediocre) Copy Rogue (