Tactics for the Swamp (Fortress).

Earthquake has a 50% chance. Teleport and Anti-Magic each have a 10% chance. All the other ten spells have a 2-4% chance....
So, yes, it's not 100%, but it's also not "slightly" higher than the others. It's incorrect to assume that the probability of Teleport appearing in at least one of the slots is 30%. Just so you know.

Back when there was no Figmiga and I was in middle school, I used to test it like this: I would set up 40 Swamp Castles and see what would appear... back then, it seemed to me that Earthquake and Teleport always appeared, or rather, at least one of them.
Now that I know math, I can calculate everything: if one slot has a 50% chance of Earthquake and a 10% chance of Teleport, then the probability of Teleport appearing is 27.1%, and the probability of Earthquake appearing is 87.5%, and the probability that at least one of the two will appear is 90.9%.
That's the math!! :-)

Maybe it's been said before, but I'll say that in the Swamp, on the third floor of the guild, they ALWAYS give you Teleport!!! That's a fact!

I sincerely apologize!!! Of course, I meant Earthquake!!!