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If you want to have some, now it's time to decide if you want to get it before it is revealed and the rarity and land category of plots are known or after. After, common plots will be cheaper, but rarer and magical/occupied plots will likely be more expensive.

what could be the benefits of those rarer magical plots?

If I remember well on magical plots you get a rare resource needed to mint spells.

Rarity determines the productivity of the plot. Alongside other factors, like totems and the cards you have staked on it.

Occupied plots have monsters on them controlled by the game, and you fight them to get rewards, from the little details we have so far.

Thanks Adrian, appreciate the info! !CTP