Gatekeeper's Set

Set bonuses passives shown at an average roll

• 2pieces
  +7 Armor

  Iron Bars: Your guards and shields are 10% stronger
• 4pieces
  None Shall Pass: The first enemy action each battle targets you and deals 27.5% less rolls The first enemy action each battle targets you and deals 20–35% less
• 5pieces
  Hold the Door: After you step in for an ally, deal 20% of the blow back rolls After you step in for an ally, deal 15–25% of the blow back

Every piece rolls its own "set roll"; a bonus uses the average of the pieces you wear. Flat stats grow with the set's item level (40–41 here).

Where each piece drops best first

Piece	From (chance per kill)
Gatekeeper's Helm	Chief Engineer Sprocket 3% 1 in 33 Clockwork Sergeant 2.4% 1 in 42 Ticking Cog Spider 0.8% 1 in 125 Wind-Up Mouse 0.8% 1 in 125
Gatekeeper's Plate	Chief Engineer Sprocket 3% 1 in 33 Boiler Golem 2.4% 1 in 42 Ticking Cog Spider 0.8% 1 in 125 Wind-Up Mouse 0.8% 1 in 125
Gatekeeper's Greaves	Chief Engineer Sprocket 3% 1 in 33 Boiler Golem 2.4% 1 in 42 Angry Kettle 0.8% 1 in 125 Punctual Brass Owl 0.8% 1 in 125
Gatekeeper's Portcullis	Chief Engineer Sprocket 3% 1 in 33 Punctual Brass Owl 0.8% 1 in 125
Gatekeeper's Turnkey Spear	Chief Engineer Sprocket 3% 1 in 33 Clockwork Sergeant 2.4% 1 in 42 Overtime Automaton 0.8% 1 in 125 Overwound Clockwork Soldier 0.8% 1 in 125

Set pieces never come from random drops or shops, only from their theme's own sources. The zone boss and promoted foes (Champions and Elites) carry the whole set.