What Does It Mean When You Randomly Select Heroes During a Match?

"Dare you compete in our training match?" "When the official competition comes, your team won't be able to survive!" ... During the Demacia Cup game, the host was very emotional: "He actually chose a random hero, which is so insulting!" "The main road and the jungler went to outflank him, but he actually killed three of them, and then ran away with his remaining health!" "He actually killed 0 out of 15, he's so strong!" "This game only took 15 minutes." "This game broke many records in the Demacia Cup." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.