Dota 2 has a large number of arcana, which are special sets of items that change the appearance and effects of heroes. Arcana in Dota 2 are rare and valuable items that can be obtained in various ways. Here are some of them:

1. Buying on the Steam Steam Steam Steam: Many arcane items are available for purchase on the Steam Steam Steam Steam Steam Steam Steam Trading Desk, where players can buy and sell items for Dota 2.
2. Opening Chests: Some arcana can be obtained by opening chests or treasure chests. Chests can be purchased on the Marketplace or obtained in-game.
3. Events and Tournaments: During special events or Dota 2 tournaments, developers may issue special harnesses for events or tournament play.
4. Completing Campaigns and Achievements: Some arcana may be earned by completing specific campaigns or achievements in the game.
5. Purchasing from other players: If you have items to exchange or sell, you can try to find other players who are willing to exchange their harness for your items.

It is important to note that some arcana can be very rare and expensive, especially if they are limited edition or collectible items. Acquiring arcana depends on their availability and their price on the market.