The rarity of The Mage Slayer's Set is Rare, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
The Mage Slayer's Set is a skin for Anti-Mage. The skin was added to the game on Invalid Date.
The Mage Slayer's Set is currently one of the most popular skins, but it is rarely seen in the game due to its high price.