I have two questions: if the source used to cast a realm spell is destroyed,
does the spell end? What about if the casting wizard is killed, do all his
ongoing realm spells collapse?

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Aleksei Andrievski
aka Solmyr, Archmage of the Azure Star
aka Azure Star Dragon
solmyr@kolumbus.fi
http://www.geocities.com/TimesSquare/Fortress/2198/index.html