Rules

Win by raising your tower to the target height, destroying the enemy tower or collecting enough of any resource. The targets depend on the battlefield.

Ore (red cards) comes from mines, mana (blue) from monasteries, troops (green) from barracks. At the start of each of your turns you gain as much of each resource as you have producers. Producers can be destroyed down to zero.

Each turn you play one card, paying its cost, or discard any card. Then your hand refills to six cards. Some cards let you play again or force a discard.

Normal damage breaks the wall first and the rest hits the tower. Tower damage goes straight through the wall.

In a duel each turn has the time chosen by the host. Too slow — your worst card is discarded. Several misses in a row lose the game. The deck is shuffled fairly: the deal hash is visible before the game and the seed after it.

The standard deck holds every card once. When it runs out, the discards are shuffled and come back into play. The infinite deck draws every new card at random from the whole set. The same card may come several times in a row and even sit twice in a hand. The host of a request picks the deck; an icon shows it in the requests table.