The Arcana finals are between Rubick and Faceless void for this years The International 2018. Every year, players get to vote for their favourite heroes and which heroes they want to see an Arcane ( a cosmetic item) released. This year the finalists are Rubick and Faceless void with Rubick leading at the moment.
You can cast your votes from within the Dota 2 client, but only if you have a battlepass.
— Wykrhm Reddy (@wykrhm) August 14, 2018