Flawless Breachstones can only be acquired from completing Maven's Invitation: The Hidden(Search). They have a much higher monster level and contain additional random map modifiers.
Drop level: 80.
It can’t be obtained via Blessing of Chayula. Currently, Pure Breachstone is the highest tier via Blessing currency.
Flawless Breachstones require a substantially more powerful character to complete, but have rewards appropriate for their difficulty.
Uul-Netol’s Vow is a unique Unset Amulet. It effectively enables you to turn any six-linked body armour into a seven-link. This item only drop from Flawless Breachstones.
Special versions of the Grasping Mail Body Armour which has a specific Fractured Modifier themed around the Breachlord of that domain.
All Breachstones have been modified so that the items you earn from monsters are now dropped in a spiral at your feet when you complete or fail the event. In addition, Rare Monsters in Breach domains drop an additional random reward type, such as Maps, Scarabs or Divination Cards, with Flawless Breachstones adding 2 additional reward types. All Breachstones are far more rewarding than before.
Chayula’s Flawless Breachstone
Chayula’s Flawless Breachstone is a map fragment. Place this item in the map device to open the Chayula’s Domain portal. Can only be used once.
Portal: Chayula’s Domain. Area Level: 84.
Rare Monsters drop 2 additional Reward Types
Area has 4 additional random Modifiers
200% increased Experience Gain
250% more Monster Life
60% increased Rarity of Items found in this Area
60% increased Pack Size
Monster Level: 84
Existing Breachstones now have two random modifiers (from a pool that doesn’t include build-disabling ones such as not being able to leech), and the new Flawless Breachstones have four of these modifiers, which represents a significant jump in difficulty.
Breachstones are items obtained by combining 100 Splinters (This process is irreversible). Like maps, they can be placed in the map device. A Breachstone will generate six portals to its corresponding Breachlord’s domain, a high-level area where the Breachlord can be fought.