app/cards/empires/events/delve.js
Delve = class Delve extends Event {
coin_cost() {
return 2
}
buy(game, player_cards) {
let buy_gainer = new BuyGainer(game, player_cards)
buy_gainer.gain(1)
let card_gainer = new CardGainer(game, player_cards, 'discard', 'Silver')
card_gainer.gain()
}
}