gistfile1.txt

function fetchRemoteImage(id) {
	console.log('fetchRemoteImage(%s);', id);
	var card = cards[id];
	if(card === undefined) throw new Error('Card "'+id+'" not found.');
	var url = 'http://hearthstone.gamepedia.com/'+encodeURIComponent(card.name.replace(/ /g, '_'));
	return fetch(url)
		.then(function(body) {
			var m = body.toString('utf8').match(/<img alt="" src="([^"]+)" width="[^"]+" height="[^"]+" class="thumbimage"/);
			var url = m[1].replace(/(\?.*)/, '');
			m = url.match(/\.(png|jpg)$/);
			fileName = fileBase + m[0];
			return fetch(url);
		})
		.then(function(body) {
			return fs.writeFileAsync(fileName, body, {encoding: 'ascii'});
		});
}

Thanks 😄