Autographed Tail of the Iron Will is a Dota 2 item of Common rarity. On DotaLoot you can win it in free giveaways or earn it with Battle Pass levels.
You can get Autographed Tail of the Iron Will for free in daily DotaLoot giveaways or with Battle Pass levels. The fastest way is opening cases — noticeably cheaper than buying it on the market.