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Sounds plausible. We hide behind the castle, summoning a boat for him beforehand, and wait for him to sail away. Then we take the castle, buy 7 heroes, and block the landing with burrows or heroes. After that, when he reveals the entire map, we put one hero in a boat and make sure the AI kills him by getting as close as possible to the shore. Then we use a hit-and-run tactic with an explosion.