Zen State
The effectiveness of your Stagger is increased by up to 15%, based on your missing health.
Tree position
In the Brewmaster Monk talent tree, Zen State sits in the Brewmaster specialization talents, row 7 of 11. It is a single-point node. Its row opens once 8 points are spent in Brewmaster Talents.
Connected above
The tree draws a line into Zen State from Light Brewing or Training of Niuzao.
Light BrewingReduces the cooldown of Purifying Brew, Celestial Brew, and Celestial Infusion by 20%.
Training of NiuzaoGain up to 15% Mastery based on your current level of Stagger.
Connected below
Zen State leads on to Press the Advantage or Blackout Combo, Anvil and Stave and Awakening Spirit or Vital Flame.

Blackout ComboBlackout Kick also empowers your next ability: Tiger Palm: Damage increased by 100%. Keg Smash: Reduces the remaining cooldown on your Brews by 2 additional sec.

Awakening SpiritPurifying Brew also surrounds you with protective energies for 15 sec. When Staggered damage would be dealt to you, you instead absorb up to 50%, until (600% of Attack Power) has been prevented.
Vital FlameHeal for 50% of all Fire or Nature damage dealt by your spells and abilities.
Same row
Also on this row: Scalding Brew or Sal'salabim's Strength, Fortifying Brew: Determination, Bob and Weave or Black Ox Brew, Walk with the Ox, Tranquil Spirit and Face Palm.
Scalding BrewKeg Smash deals an additional 20% damage to targets affected by Breath of Fire.
Sal'salabim's StrengthWhen you use Keg Smash, the remaining cooldown on Breath of Fire is reset.
Fortifying Brew: DeterminationFortifying Brew increases Stagger effectiveness by 15% while active. Combines with other Fortifying Brew effects.
Bob and WeaveIncreases the duration of Stagger by 5.1 sec, causing Staggered damage to be dealt to you more gradually.
Black Ox BrewChug some Black Ox Brew, which instantly refills your Energy, Purifying Brew charges, and grants one charge of Celestial Brew or Celestial Infusion.
Walk with the Ox2 ranks
Tranquil SpiritWhen you consume a Healing Sphere, you clear 5% of your currently Staggered damage.

Talent trees
Zen State is in the talent tree of 3 specializations. Monk: Brewmaster (Tank), Mistweaver (Healer), Windwalker (DPS).
Zen State Changes by patch
Tracked changes to this talent between game data builds, newest first.
- First tracked in the game data (patch 12.1.0)