Nerd tips

Card advantage means having more cards than your opponent. Tempo means keeping them under pressure. You rarely get both at once — you have to choose.

Every card in your hand has a Counter value (0, 1000, 2000). Once you know how much Counter your opponent can muster at most, you can pitch your attacks deliberately above that ceiling.

If your opponent leaves DON open, they either have a plan or they are bluffing. Count their cards, look at the open DON and work out what they could play. That changes how you attack.

The rule is short: you see five cards and may put them ALL back ONCE, shuffle, and draw five new ones. You cannot swap individual cards, and you still get five — so the mulligan costs nothing but the information you already had. The keep rule in one sentence: can I do something on turn 1 and turn 2, and is there at least one card that gets my deck going? The player going first does not draw on their first turn and only gains 1 DON!!. So when you start, be stricter: no cheap card means mulligan. Going second you may keep a hand one card slower.

Attack before you build your board. Your opponent then has to decide without knowing what is still coming — and a trigger they reveal hits a board that is not there yet. Within the turn: weak before strong. A 5000 attack eats counters that the 7000 attack will miss later. Do it the other way around and you pay for the big attack with your opponent's cheapest counter. And do their maths too: count their cards in hand and estimate the most counter power those could hold. An attack one step above that line goes through — anything below it is a gift.