POE2 Return of the Ancients Complete Guide — League Mechanic, Rune System & Endgame

Ancient Portal Mechanics

Randomly appearing Ancient Portals in maps lead to Ancestral Realms. Defeat Rune Guardians for rune fragments. Combine fragments into complete runes. Portal spawn rate can reach 40% with Atlas passives.

Rune Collection & Infusion Strategy

Four rarities: Normal (white), Magic (blue), Rare (yellow), Legendary (orange). Early on, focus on same-element runes for resonance. Legendary runes only drop from Aldur, featuring unique "Rune Words".

Ancestral Trials

Unlock trials by meeting specific conditions. Each completed trial grants permanent stat bonuses and unique cosmetics. All 12 trials unlock the "Ancestor Witness" title.

Aldur Boss Tactics

Three phases: Phase 1 ranged rune barrage, Phase 2 summons Rune Guardians, Phase 3 full-arena rune storm. Recommended 75%+ fire resistance and minimum 4,500 effective life.