Well muy cuestión is simple?..
How do i get the champion córner??
Where is the champion córner??
Whst lvl forma is??
Its because i want to unlock riley people told me i need lvl 50 bit how others guys are los lvl and hace this hero??

You can get hero cards from gold/diamonds chests, generally if the soulstones for a hero are available for farming you can get the hero from the chests.
Champion corner is epic arena, you unlock it at level 60.