Guide to Upgrading with Tertiary Calamity Fragments

[Matthew]

Tertiary Calamity Fragments in Path of Exile 2 represent the pinnacle of endgame currency, directly upgrading your access to elite content rather than gear modification. Unlike orbs or catalysts that reroll affixes, these fragments earned from Royal Thaumaturge Doryani in maxed Stone Citadels complete a trio with Primary and Secondary keys to summon the Uber Arbiter of Ash at the Burning Monolith. This "upgrade" unlocks a harder boss variant with 22.6 million HP, escalating flame seeds, sword hallways, and beam phases into biased rewards like Prism Diamonds for jewel scaling and uniques such as Solus Ipse Grand Visage. In Rise of the Abyssal league, this path supercharges builds from T16 mapping to ladder dominance.

Preparation for Fragment Farming

Push Atlas boss tree to 10+ points via T16 clears (area 79+, 6+ modifiers)—this swaps basic Crisis drops for Calamity ones. Stack waystone quantity to 300-700% with Grand Precursor Tablets, Visions of Paradise for radiation-free doubles, and right-side quant nodes like Remnants of Power. Roll maps for mana siphoning prefixes on linear coastlines; RF Chieftain or Lightning Arrow Deadeye clears labs efficiently with 60% fire res, culls, and exposure. Linear routes hit towers early, chaining Citadels in under 7 minutes for 2-3 fragments per run.

Activating the Upgrade

Travel to the Burning Monolith near Atlas origin and slot the full set into the special door—any Calamity mix works, but trifectas maximize loot bias. Uber mode ramps mechanics: dodge Phase 1 seeds, bait Phase 2 slams, survive Phase 3 chasms with flame dash or elusive. Death downgrades safely to base Arbiter without key loss, enabling retries. Group shares loot pools for amplified drops.

Maximizing Upgrade Rewards

Victories yield Prism of Belief Diamonds for skill boosts and jewel crafts, Morior Invictus Regalia for defenses, and Sine Aequo Manchettes for speed—socket these for Pit 100+ scaling. Trade surplus at 10-30 divines on poe.ninja to fund tablets, creating self-sustaining loops. Best practices: double-dip Citadels (vision first, tablets second) for 4-6 sets hourly; layer Breach scarabs for density. Avoid rarity mods or irradiated T16s pre-mitigation.

This upgrade cycle turns fragments into eternal power—farm consistently, push Ubers, and evolve from mid-mapper to titan slayer. Post-patch tweaks sustain viability; adapt atlas paths and watch poe.ninja for flips.