The skin was added to the game on August 17, 2021. It was created by VALVE.
The rarity of Silverwurm Sacrifice - Arms is Mythical, and been equipped it takes a “arms” slot. The skin doesn’t have alternative styles. At this moment the item is not available for trade.
At the moment, Silverwurm Sacrifice - Arms is not on the list of popular skins and is rarely seen in the game.