What does Unicorne Mortars do in AoE3?

Mortar: Coin cost −50%, damage +30%, train time −15%. The game says: "Mortar training cost decreased, train rate and attack increased."

Home City card

Unicorne Mortars

Unicorne Mortars (tech ID HCUnicorne) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Industrial Age. Effect: Mortar: Coin cost −50%, damage +30%, train time −15%.

Quick answers (3)

Which civilizations have the Unicorne Mortars card?: Russians.
What does Unicorne Mortars do in AoE3?: Mortar: Coin cost −50%, damage +30%, train time −15%. The game says: "Mortar training cost decreased, train rate and attack increased."
What is the tech ID of Unicorne Mortars?: HCUnicorne.

Mortar training cost decreased, train rate and attack increased.

What it does

Mortar: Coin cost −50%, damage +30%, train time −15%

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

In these decks

RussiansIV×1

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