PoE 3.18: Guardian’s Aid is now a Keystone called Inevitable Ambush and no longer grants “Map Bosses have 1% chance to drop a Shaper Guardian Map (Tier 14+)”.
Inevitable Ambush Keystone
Inevitable Ambush is a new Atlas Keystone Passive Skill.
Shaper and Elder Guardians are healed and joined by an ally on first reaching 33% Life
Allies have a chance to drop their Fragments
(Shaper Guardians are Guardian of the Chimera, Guardian of the Minotaur, Guardian of the Hydra and Guardian of the Phoenix)
(Elder Guardians are The Enslaver, The Eradicator, The Constrictor and The Purifier)