First Sinner
The First Sinner is an optional Silksong boss in The Slab, an ancient Weaver condemned for apostasy who rewards Rune Rage.
- Region
- The Slab
- Act
- Act 2-3 (optional)
- Reward
- Rune Rage Silk Skill
The First Sinner is an optional boss locked behind three keys in The Slab, an ancient Weaver condemned for apostasy. It telegraphs silk-wrapped needle plunges, teleport slashes, and second-phase rune detonations, and dangerously it heals itself if it manages to bind Hornet, so you must avoid its snares. The reward is the Rune Rage Silk Skill. It is one of the hardest optional duels in the late game.
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