Re: PostQuestionsHere
Check out the spell guide info under questions/feedback for more info.
To active spells you must unlock the alchemist. To unlock the alchemist you have to upgrade to your castle to level 2, to do that it costs 4 billion gold, BUT you need to low land complete first.
Some spells also need a requirement to use. All spells must have the correct amount of Mithril needed in order to be activated. To obtain Mithril you must win on system wars and participate.