cbs have been -10 for as long as I've played. his own fault for being in an aligned clan at 75. he shoulda stopped lower or not been aligned.
This. Being a PK or in PK mode doesn't give you any special immunity from clan battles.
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Computing the probability that at least one of the following events will occur:
P(a or b ... or z) = 1 - P(!a and !b ... and !z) Probability