What does Riders of the Apocalypse do in AoE3?

Retainer: damage (Siege) +30%; Light Cavalry: damage (Siege) +30%. The game says: "Retainers and Light Ranged Cavalry inflict more damage against buildings."

Home City card

Riders of the Apocalypse

Riders of the Apocalypse (tech ID DEHCRidersApocalypse) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Colonial Age. Effect: Retainer: damage (Siege) +30%; Light Cavalry: damage (Siege) +30%.

Quick answers (3)

Which civilizations have the Riders of the Apocalypse card?: Poles.
What does Riders of the Apocalypse do in AoE3?: Retainer: damage (Siege) +30%; Light Cavalry: damage (Siege) +30%. The game says: "Retainers and Light Ranged Cavalry inflict more damage against buildings."
What is the tech ID of Riders of the Apocalypse?: DEHCRidersApocalypse.

Retainers and Light Ranged Cavalry inflict more damage against buildings.

What it does

Retainer: damage (Siege) +30%
Light Cavalry: damage (Siege) +30%

Cost: 1
Sent from: II
Times it can be sent: 1
Game ID: DEHCRidersApocalypse

In these decks

PolesII×1

Source: techtreey.xml and the Home City files, AoE3: DE 100.19.18309 (build 25040513).