make at least a one-minute battle, and you can sign up; if you can still fight for a minute, then 30 seconds is an autobattle
And by the way, the 2s2c template often generates sandy swamp secondaries, even though the opponent may have grass or dirt; it would be good to specify that both should have sandy or normal secondaries.
And regarding the rule:
1. level 4 spells (sanctuary scrolls) can only be used after building a level 4 guild (strong guards don't work, and not all mines are taken on a small map).
2. ban external markets, which are often generated.
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