Q: Several abilities allow Tzeentch Wizards to cast spells they
did not know at the start of the battle ‘if it is possible for them to
do so’. Can you explain what this means?
A: It is not possible to cast a spell if the spell requires
the caster to have a keyword in order to attempt to cast
it and the caster does not have that keyword on their
warscroll, or it requires you to use a value on a damage
table and that damage table is not on the caster’s
warscroll. In addition, in a Pitched Battle, these abilities
do not allow a Wizard to attempt to cast an endless
spell if you have not paid the points to use that endless
spell model.