Crafting a Bloodforged Sigil is your first step in attempting the new Abattoir of Zir dungeon in Diablo 4. This seasonal endgame dungeon is supposed to provide some extra challenge to those who've already done everything and crave something a little harder. The Abattoir of Zir is basically a post-tier 100 continuation of Nightmare Dungeons, with even higher level enemies, and Bloodseeker bosses you'll need to defeat.
While it's sad that the Abattoir of Zir has no permanent rewards—the incredible Tears of Blood glyph you can get disappears at the end of the season—it does offer more of a challenge than simply beating the same old bosses over and over. If you're level 100, have completed your Season Journey, and are confident in your build, it's worth completing tier one simply to get the glyph and its big damage increase.
