PoE Sentinel Guides: Crafting Breeding Power Core

The following Sentinel base types are obtainable in zones or Sentinel Caches:

• Rusted (Act 1 Stalker only)
• Bronze
• Cobalt
• Brimstone
• Emberstone
• Obsidian

The following Sentinel base types are only found in Unique form or created by Assembling:

• Cryptic (Assembly)
• Primeval (Assembly)
• Ancient
• Cosmic (Unique Apex only)

Preparing Sentinel bases

• Prepare your item filter. Normal rarity Sentinels can be safely hidden.
• Collect Sentinels from enemies or Sentinel Caches and ID them.
• Filter all Stalker and Pandemonium Sentinels with chance for Empowered Enemies to have X Reward of the following types: Currency, Sentinel, Divination card, Scarab, Harbinger, Breach, Fossil, Legion, Blight, Metamorphosis, Expedition, Heist, Ritual, Delirium

Regex:

  "(cy|el|rd|ab|ger|il|ion|ht|is|st|ual|um|ch) r"

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Grafting Sentinels

For Bronze and Cobalt Sentinels with the chance for Empowered Enemies to have X Reward modifier, you may want to transfer these to a low-value Obsidian base. This process is referred to colloquially as “grafting”.

• Use a Power Core to open the Sentinel Assembly
• Insert the donor Bronze/Cobalt Sentinel and the recipient Obsidian Sentinel base (magic or low-value rare)
• Assemble a new Sentinel and check the results.
  • If you get an Obsidian Sentinel with the Reward mod, stop here.
  • If you get a Bronze/Cobalt Sentinel with the Reward mod, repeat the grafting process with a new Obsidian base.
  • If you get either base type without the Reward mod, you have lost the mod and need to start over with new Sentinels. Obsidian bases can be reused for future grafting, however.

Breeding Sentinels with Power Core

• Prepare your used-up Sentinels with good Rewards.
• Select a Power Core
  • Transforming Power Core – more likely to give Cryptic, Ancient or Primeval bases
    • Use to merge Sentinels with good rewards but Obsidian (or lower tier) bases.
  • Amplifying Power Core – more likely to increase mod tier
    • Use to merge Sentinels if one or both are already on special bases to attempt to raise Reward mod tier.
• Avoid using these Power Cores
  • Power Core – default
    • Use for grafting or combining bad Sentinels only. Has ~5% chance to return a mutated base.
  • Augmenting Power Core – randomize outcome
    • Use for combining bad Sentinels.
• Each mod has approximately 50% chance to appear on the new Sentinel.
  • Avoid doubling up on good mods as succeeding on the first mod will cause the second mod to be wasted.
  • Avoid combining Sentinels with a total of >6 mods to prevent mod dilution.