Fortress Covenant Cobalt JewelLimited to: 1 Radius: MediumMinions deal (35-45)% increased Damage Minions have +(10-12)% Chance to BlockAttack Damage Minions have +(10-12)% Chance to BlockSpell Damage Notable Passive Skills in Radius are Transformed to instead grant: Minions take 20% increased DamageCorruptedForsake what you might have had. Command power beyond your potential.Place into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket.
Fortress Covenant is a uniqueCobalt JewelCobalt JewelPlace into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket..
Notable Passive Skills in Radius are Transformed to instead grant: Minions take 20% increased Damage: Fortress Covenant can be socketed into the jewel socket of a medium/large cluster jewel, but that the mod will not affect the notable from the cluster jewel, effectively making this jewel has no downside. Note that build like minion popcorn build that utilize Minion Instability and item such as Earendel's EmbraceEarendel's Embrace Grinning FetishSceptre Physical Damage: 24-36 Critical Strike Chance: 6.00% Attacks per Second: 1.50 Weapon Range: 1.1 metresRequires Level 35, 62 Str, 62 Int18% increased Elemental Damage+(20-30) to all Attributes Minions deal (30-40)% increased Damage Summoned Skeletons Cover Enemies in Ash on Hit Summoned Skeletons take (15-30)% of their Maximum Life per second as Fire Damage Summoned Skeletons have Avatar of FireThere the weary multitude of man-kind shall turn in their masses into the wide fire, where the destroying flame embraces the living, some will go up, some down, filled with misery. may want to allocate more notable within the jewel radius instead to make the minion die faster.
Item acquisition
Fortress Covenant has restrictions on where or how it can drop. It cannot be chanced.
Recipes
Fortress Covenant can be created from the following recipes:
Amount
Part
Notes
Description
Meta
1
Cobalt JewelCobalt JewelPlace into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket.
Vaal OrbVaal OrbStack Size: 20Corrupts an item, modifying it unpredictablyRight click this item then left click an item to corrupt it. Corrupted items cannot be modified again.
Minions have +(10-12)% Chance to Block Attack Damage
Minions have +(10-12)% Chance to Block Spell Damage
Notable Passive Skills in Radius are Transformed to instead grant: Minions take 20% increased Damage
Not corrupted Fortress Covenant are all legacy items and only be obtained from trading with other players in the permanent leagues. Also, corrupted Fortress Covenant that have corruption implicit are also legacy.
Introduced to the game as a replacement for Fortified LegionFortified Legion Cobalt JewelLimited to: 1Minions have (5-15)% increased maximum Life Minions Recover 2% of their Life when they BlockWhen you throw iron weapons against an iron wall you only make the wall grow thicker.Place into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket., initially as a natural drop.
See also
Quickening CovenantQuickening Covenant Viridian JewelLimited to: 1 Radius: MediumMinions have (12-16)% increased Attack Speed Minions have (12-16)% increased Cast Speed Minions have +(20-24)% chance to Suppress Spell Damage Notable Passive Skills in Radius are Transformed to instead grant: Minions have 25% reduced Movement SpeedCorruptedLose that which you never had. Gain power you could not have grasped.Place into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket.
Cobalt JewelCobalt JewelPlace into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket.
.
Minion Instability and item such as 
Earendel's EmbraceEarendel's Embrace
may want to allocate more notable within the jewel radius instead to make the minion die faster.
Vaal OrbVaal OrbStack Size: 20Corrupts an item, modifying it unpredictablyRight click this item then left click an item to corrupt it. Corrupted items cannot be modified again.
Compare each legacy variant to the current variant.
Quickening CovenantQuickening Covenant