What does Scorched Earth do in AoE3?

Arrow Knight: damage (Siege) +50%; Eagle Runner Knight: damage (Siege) +50%; Jaguar Prowl Knight: damage (Siege) +50%. The game says: "Nobles' Hut units' attack versus buildings increased."

Home City card

Scorched Earth

Scorched Earth (tech ID HCXPScorchedEarth) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Industrial Age. Effect: Arrow Knight: damage (Siege) +50%; Eagle Runner Knight: damage (Siege) +50%; Jaguar Prowl Knight: damage (Siege) +50%.

Quick answers (3)

Which civilizations have the Scorched Earth card?: Aztecs.
What does Scorched Earth do in AoE3?: Arrow Knight: damage (Siege) +50%; Eagle Runner Knight: damage (Siege) +50%; Jaguar Prowl Knight: damage (Siege) +50%. The game says: "Nobles' Hut units' attack versus buildings increased."
What is the tech ID of Scorched Earth?: HCXPScorchedEarth.

Nobles' Hut units' attack versus buildings increased.

What it does

Arrow Knight: damage (Siege) +50%
Eagle Runner Knight: damage (Siege) +50%
Jaguar Prowl Knight: damage (Siege) +50%

Cost: 1
Sent from: IV
Times it can be sent: 1
Game ID: HCXPScorchedEarth

In these decks

AztecsIV×1

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