app/cards/renaissance/artifacts/treasure_chest.js
TreasureChest = class TreasureChest extends Artifact {
start_buy_event(game, player_cards, treasure_chest) {
game.log.push(`<strong>${player_cards.username}</strong> resolves ${CardView.render(treasure_chest)}`)
let card_gainer = new CardGainer(game, player_cards, 'discard', 'Gold')
card_gainer.gain()
}
}