Nintendo
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Wait, damn( How is that possible? Meaning, if I built, for example, a Dimension Door, and I know the opponent might arrive soon, I can't rebuild the tower so he doesn't get this Dimension Door for free? That is definitely bad.
And another situation: after building and researching an imp, I can no longer rebuild it into a Dimension Door? And vice versa, etc. etc.? Well, that's just not right(
And if you research a spell at Mage Guild level 5 in a new way, is it possible to rebuild the guild level using the old way? And what will happen to the slot? Will there be a new spell, but already fixed, or can it be researched again?