My friends told me that there is a 7th infinity stone called ego stone and also says in avengers 4 the avengers defeat thanos with the help of ego stone..

In avenger iw movie,wong and dr strange told there is only 6 stones and it is created in formation of universe or big bang...

And some of my friends also says there are only 6 stones.

Im searched for it on internet and youtube. But internet shows that the 7th infinity stone is real.

And some youtubers says iron man creates the 7th stone in avengers 4 movie. And some youtubers says iron man already created 7th stone in iron man 2 movie and it is in his arc reactor..and some of them says after creation of the 6 stones, the ego stone is created by odin or celestians or some powerful creatures...

So guys.. tell me..

is there a 7th infinity stone?

If it is true..How it is formed and where it is?

Is avengers found ego stone in avengers 4?

How avengers defeat thanos in avengers 4??