Kingsbane

In the Assassination Rogue talent tree, Kingsbane sits in the Assassination specialization talents, row 8 of 11. It is a single-point node. Its row opens once 20 points are spent in Assassination Talents.

Connected above

The tree draws a line into Kingsbane from Amplifying Poison and Venomous Wounds.

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  Amplifying Poison

  Coats your weapons with a Lethal Poison that lasts for 60 min. Each strike has a chance to poison the enemy, dealing (8.1% of Attack Power) Nature damage and applying Amplifying Poison for 12 sec. Envenom can consume 10 stacks of Amplifying Poison to deal 35% increased damage.

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  Venomous Wounds

  You regain 3 Energy each time your Garrote or Rupture deal Bleed damage to a target affected by your weapon poisons. Energy gain is reduced for bleeds beyond the first. If an enemy dies while afflicted by your Rupture, you regain energy based on its remaining duration.

Connected below

Kingsbane leads on to Zoldyck Recipe and Regicide's Reward.

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  Zoldyck Recipe2 ranks

  Your Bleed, weapon poison, and other Nature damage is increased by 15% against targets below 35% health.

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  Regicide's Reward

  When Kingsbane ends, gain 2% haste for every 5 stacks of increased Kingsbane damage that you had, decreasing by 2% every 2 sec.

Same row

Also on this row: Dashing Scoundrel, Rapid Injection, Shrouded Suffocation and Blindside.

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  Dashing Scoundrel

  Envenom's effect also increases the critical strike chance of your weapon poisons by 8%. Your Energy generation is increased by 4% for each lethal poison on your weapons.

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  Rapid Injection2 ranks

  Envenom's effect increases the damage of Envenom by 20%.

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  Shrouded Suffocation

  Garrote damage increased by 30%. Garrote generates 2 additional combo points when used from Stealth.

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  Blindside

  Ambush and Mutilate have a 10% chance to make your next Ambush free and usable without Stealth. Chance increased to 20% if the target is under 35% health.