Banners
5 banners in Total War: Warhammer III, patch 9.0, with the effects the game lists for each. “All races” means any race can get it.
5 of 5
Banner of Ghorok
Rare · Beastmen
Armour: -30
(assigned Minotaurs unit)
Melee attack: +40
(assigned Minotaurs unit)
Weapon strength: +50%
(assigned Minotaurs unit)
Banner of the World Dragon
Rare · High Elves
Spell resistance: 25%
Last of the Great Mawherd
Unique · Norsca
Speed: +8% for Feral Mammoth and War Mammoth units (Lord's army)
Recruit rank: +2 for Mammoth units (Lord's army)
Revered Banner of the Ancestors
Rare · Grand Cathay
Melee attack: +7
Throwing Bombs
Common · Vampire Coast
Bonus vs Large: +10
Source: ancillaries, ancillary_to_effects, ancillary_uniqueness_groupings and faction_set_items, patch 9.0, via the WH3-Dump export.